I love projects like this and I have connected my Dreamcast, but never when I went to play has anyone actually been online. (anyone can check who's playing online with their Dreamcast here: https://dreamcast.online/now/ )
I have started using Mailbox.org since about a year with several custom domains. Its around 3 €/$ per month for the basic tier which also includes some cloud storage and an online office suite (of which neither I use). I've been happy with it.
Oops. Thanks autocorrect
Why would anyone want to intentionally produce more than the current demand which lowers prices and therefore profit?
Unless you mean they produce more to lower their own costs, which I doubt would really be the case here.
Like a Smooth Operator
And a spark plug box as a GPU holder. This person is ingenius.
Which DE? I am using Plasma and notice some weird things like flickering screen when I am playing YouTube videos in Fullscreen with VRR.
A PSU will be most efficient if the load is close to what it's designed for. A PicoPSU doesn't have as many components as say a full ATX PSU and they are all sized for tiny loads.
I have used Pico PSUs on several occasions, more so due to their size than their effeciency. So I don't think I'd swap a normal PSU out for one. With the difference of just 10 watts you'd probably have to run it 24/7 for years to break even in the cost of purchase.
If only there were better options...
That's how it's done here as well. A USB modem attached to a raspberry pi (or just any pc) which answers the dial up connection from the Dreamcast, routing it through broadband.