Maybe not, but like you were told from another comment waze is also a Google/Alphabet product. As an otherwise near fully de-googled phone user, google maps is still the best option I know of.
Almost everything you said here is false, with the exception of controversy over the developer. However, GrapeheneOS is far from a single developer project, and the former lead stepped down a little while ago.
Works fine, I have two smart TVs I did that to.
Yeah, Jerboa has been a buggy mess the entire time I've used it and this finally got me to try Voyager. 10,000x better experience. I know developing an app is not easy and I hope Jerboa can get through its growing pains, but Voyager is great right now.
Just convenience in the form of focusing on a user-friendly out of the box experience, really. That's enough for me to use it over Debian on desktop, though I like Debian for servers.
Hard to say. Information is valuable in any type of economy, so it may be more to do with where public concensus lies on privacy issues, and the competency/trustworthiness of oversight.
Yeah, they are a cool company that has been serving this niche market for a long time.
That's good information. I already had a setup for openvpn, so I just plugged in their ovpn files and kept going.
Fair. My understanding is that not all of their lineup is equally Linux friendly. I had the original GPD pocket, which IIRC had a official Linux image. I didn't even use that image, and had a functional Ubuntu install. Their newer devices are more mature from a hardware perspective, so it may be worth some research on those regarding features and Linux compatibility.
Swap space is good to have, but a swap file is more convenient than a swap partition
I've used Hetzner for years without issue. Accessed through VPNs to the control panel without problems, changed password no issue, etc. I've never heard of them being "known for" the behavior you describe. This is just anecdote vs anecdote, though. I'd be interested to see some kinda evidence of what you're saying.