We already have them, they called Windows XP and 7.
Although this is an issue, but it's pretty safe to say that "it's their fault". Also Pop!_OS has the annoying for me pop-up once in a while that tells me that there are updates available. With this users probably will still update sometimes.
Matrix room? Where? There is no official Matrix space.
I agree, I hate discord, but that's where everybody is messaging, including authors. BTW, we had a "community call" a few days ago in the discord. It's a monthly thing.
Flatpak doesn't conform to the XDG home directory, and that upsets me. Also we have an ongoing dispute between SI and IEC units on their GitHub. But I like it otherwise.
I can't think of anything close. The only thing I got is "rear...something" and "back...something". I don't think it's even a real word in Russian, but it does sound like one, and that's why it's funny (and it also describes ass).
What's "custom layout tables"? Anyway, I now only play https://typst.app card, because I don't use LO Writer anymore, only LO Calc for some stuff. Typst has a ton of scripting capability and granular customization, so it will probably beat your "custom layout tables" by a mile kilometer!
Typst is the future for document creation. Mark my words.
GOTEM