I think kavita works fairly well. It doesn't have an app, but it comes with a built-in OPDS server, so you can just plug the link into any app that supports it and access all your book. For eink devices I recommend koreader. For other devices you may prefer an app with a less confusing UI, but that's a matter of preference. Alternatively the kavita webclient has a reader as well.
Immutable systems are useful for separating the system and application layers and to enable clean and easy rollbacks. On servers the applications are often already separated anyway through the use of container technologies. So having atomic system updates could enable faster and less risky security patching without changing anything about how applications are handled.
I don't know how well the Jellyfin app for xbox works, but you can also install Kodi with the jellyfin addon I think. Or share your library via smb and connect to that directly with Kodi.
That's pretty cool. Works with FlorisBoard as well, and without internet. If you intend to use other languages than english you need to let it download some more stuff first.
I'm not aware that progress saving is a default feature of OPDS. There is some work being done in that direction, but I don't know of any server/app combinations that do that for ebooks.
Apart from that, I'm relatively happy with kavita. It comes with a web UI though.
Just be aware that that answer is very over-simplifying things. "Left" and "right" are supposed to signify political ideas, not certain parties or politicians. You could say that Biden is to the "left" of Trump, but most people who would call themselves "left-wing" would consider Biden a "centrist" (between left and right) at best, maybe even skewing right-wing.
Typical left-wing ideals would be working towards freedom and equality for everyone by solidarity and cooperation, whereas right-wing ideas usually focus around preserving your own privileges by suppressing whomever you consider "outsiders" or "inferiors".
My main reason for wanting gyro in Xbox controllers is that I believe that Windows would then also implement support for it in Xinput. That way it would become a de facto default controller feature and developers would have a reason to directly implement it in their games. Then we wouldn't be dependend on Steam Input to use it at all.
From what I understand the leaks only mentioned an accelerometer, not a gyroscope. The capabilities without a gyroscope would then be more like a Wiimote without Wiimotion Plus and without the infrared stuff. So no precise positional adjustments, just shaking. The described use-case for it would be that the controller "knows" when it's being picked up. So not even in those leaks there were any plans to put a gyro in their controller like every other company out there.
I wish more Playstation games would implement this, and Microsoft would finally put gyro in their controllers as well. I find aiming in games with just sticks really uncomfortable, gyro is a literal gamechanger.
I think kavita works fairly well. It doesn't have an app, but it comes with a built-in OPDS server, so you can just plug the link into any app that supports it and access all your book. For eink devices I recommend koreader. For other devices you may prefer an app with a less confusing UI, but that's a matter of preference. Alternatively the kavita webclient has a reader as well.