It’s expected for HDR to mature on Linux later this year.
HDR works on Steam Deck right now. It may take a while until it trickles down to distributions other than SteamOS and not every compositor may support it equally but in general support is there.
Works fine on Steam Deck. (The comment you're replied to is about Linux, not a specific DE, so your experience with a specific DE doesn't really count as counter argument about Linux in general.)
And if you have a newer GPU, there’s also AI upscaling, which is great for watching HD and SD content on a 4K display. Pretty sure you can’t do they at all in Linux, at least not in real-time.
No, not any longer. In Windows 11 "update and shutdown" includes a reboot in-between and then shuts off. The only way you get this these days is to "update and reboot" and manually shutting off the computer during BIOS initialization.
Use an archiving format that does both at once then, preserving whatever tar use cases has and compressing. The two steps are stupid, no arguing against that.
First bundling everything in a tar file just to compress the thing in an individual step is kinda stupid, though. Everything takes much longer because of that. If you don't need to preserve POSIX permissions, tar is pointless anyway.
Pacifism is not lethargy to not defend oneself. Pacifism is to be the aggressor, like to not attack the neighboring country just because your country might have a dispute about trade with the neighbor.
People make regularly updated lists of possible alternatives to various applications. Finding them is a matter of firing up the search engine of choice and just entering the search terms.
Also: That question literally gave no context at all. Something along the lines of "My circumstances are XY and Gimp is not suitable because of YZ" is missing completely. I got a proper answer by asking Microsoft Copilot "What are alternatives to GIMP? I'm looking for an option that I can use with Debian 12. An open source application is preferred but not mandatory." and got a proper list of open source and web-based solutions that includes Krita, Photopea, Pixlr, and Pinta.
My mom is approaching 80 years old and can do better web searches than the person from the screenshot.