there are no good linux tablets, for any price; by "good" I mean it works as good as an Android or iOS tablet. everything is from not-as-good to way worse and there are things that are downright unusable.

whichever platform you choose (Gnome, Plasma or any of the derivatives like Phosh, Plasma Mobile, etc.) the experience beyond the first 15 minutes (hey, this actually works!) is pretty bad. it's certainly not usable as a main device that you depend on and use for actual work; as a dicking-around kinda project, sure, have at it.

before you spend that kind of money, my recommendation is to get an older Surface Pro or Dell Latitude 2-in-1 in the $150-200 range and see if that functionality is something you can live with. those can be had with up to 16 GB on-board and the SSDs are replaceable (Dells are more serviceable). kernel support is spotty, not all of the features work for all devices, mainly cameras and such; consult the linux-surface github.

edit: just saw this comment, my experiences are similar. the rest of the comments where people think what a device might work like you should disregard.

Some Microsoft surface models can run surface-linux pretty well

I wouldn't get the Librem 11, I don't trust purism after the librem 5.

I thought about buying a Starlite by Starlabs. It looked pretty cool, but I just don't need a tablet.

Minisforum just announced their V3 which is a Windows tablet with amazing looking specs. I would wait until people confirm if everything works on Linux, but it's an option to consider.

I am interested in this as well. I currently have an iPad Pro and while I won't be upgrading right now, I have been looking in the space for the future. I'd prefer something more powerful than and M1/M2 iPad to even consider switching. I haven't seen much in the tablet space that is not Apple orAndroid, but while being performant. I saw that Minisforum has announced the V3, but it isn't out yet. Has an AMD 8840u, 14" 165hz display. Looks promising, but I'd be worried about battery life.

I bought a second hand Surface Pro 5 (2017), running Fedora gnome

I've started to write a review because I couldn't really find one, and most of the comments are overly positive (as it often goes on Linux forums I've come to realize). It's not done yet

But I can summarize it: as a tablet it's not great but it mostly works. It's certainly not for someone not ready to troubleshoot, and many problems have no, or no great solutions. Also gnome used with touch controls has a major bug (which, again, nobody ever mentions for some reason. It will be in my review)

As a 2 in 1 with little touch use it could be alright. The pen is quite good if you want to draw or write, even though there's a small delay. The cover is okay, but you'd be better off with a quality laptop keyboard and big trackpad

I bought it mainly for reading, mostly European format comics (bandes dessinées). The resolution is great for that, and the size is good with a reader that removes white margins

Edit: to give you an idea I bought it for 190€ two months ago, with all accessories, good condition and good battery health (which does not mean battery life is good)

It's not out yet, but there is a kickstarter from German company Volla, coming in the next few days for a 12" tablet running a Mediatek soc that will be capable of running Ubuntu Touch - for which you can use UT native apps, webapps, some Linux desktop apps via their "Libertine" container, and some Android apps via "Waydroid." And Volla has an excellent track record of delivering on their product promises - in contrast to Purism.

https://volla.tilda.ws

Have you taken a look at the pinetab? Its probably the most Dev oriented Linux tablet. Librem-11 might be the only Linux native x86 tabket but if you don't mind flashing a new OS a refurbished/used microsoft surface would be cheap and powerful. (Need the linux-surface kernal for all functionality)

Well, I picked up a Lenovo Duet 3i for fairly cheap so I could run FreeCAD on a device in my wood shop. It's an Intel machine, one of those that the keyboard snaps off of. I've got Fedora Gnome on it, and it's not too bad. The biggest issue I have with it is sometimes it comes out of suspend in portrait mode, and there's no getting it into landscape mode with the keyboard attached, so you have to detach it, tip it a couple times, and it's back.

It's an x86 laptop, software is pretty compatible. You might go for a Yoga rather than the Duet if you're looking for programming; the tablet flop hinge plus kickstand is a bit more of an afterthought than I'd like for coding.

I purchased the Star Labs Starlite and am hyped. It holds long and is x86.

I wanted to have a convertable to also draw which makes it perfect for me and making me write this comment. Maybe its irrelevant to you. Starlabs also has a normal Laptop I think but I have no experience with both.

Currently with my chromebook duet 3 I can't really code without making it freeze or unable to execute code because its ARM.

If you don't mind waiting a few months to get it delivered, the StarLite V sounds like it will be a great device (I'm currently waiting for mine).

I have a Surface Pro 9 and it runs like a charm. I would recommend it even if it is a little pricey

I've been pretty happy with my Pixel Tablet running GrapheneOS. I don't know everything you're hoping to do, so maybe Android won't work for you. However, I've been using Plex, Newpipe, Termux, Roon, and other apps, and it's working well for me.

The stand still works as a speaker when connected as well, which is nice.

https://pine64.org/devices/pinetab2

https://pine64.org/devices/pinetab-v

For the tinkerers of course