Dont think that true anymore, im no expert but rips from tidal or quboz sound way better to me then cd rips did
cs.rin.ru is probably your best bet to find those, but you will have too look for each game separately
Dont think there is any dedicated tracker for 4k stuff, you might find some here and there. I know that immortuos has some 4k movies and i think TV and you can probably get some on other trackers by requesting it.
Not sure, i think there are some ai features still not done. Haven't looked at them for a while
No worries, the names are quite similar so its probably not too uncommon for the two to get confused with each other
Prism needs a microsoft acc to work afaik, there probably is a fork that doesnt but i dont know of. All my recommendations came from either the megathread here or fmhy.net
From my experience yes, most releases include German and English often with subs. I prefer English dubs over german ones most of the time but a lot of family members want the German ones so I look out for releases that include both. Try and look for a "DL" before the source, like Movie.Year.German.DL.WEB-DL....
Prowlarr has some listed and once you are in some of the ones with more aktive forums you can find a some more. But i agree it is a lot harder to find german ones.
WOT, TFA, ST-Tracker, Torrent-explosive, immortous are some good ones but they are provate. There arent really any public sites but getting into the private ones isnt hard. I might be able to send you an invite to one or two ot them if i have any, shoot me a dm if you want one.
Besides what the other commenter said you can probably download just the update from dodi and update your current install
Idk how stremio and torrentio work or if you can add other torrwnt sites to it similar to *arr apps but if you can then try to get into a few german torrent trackers, most lf them are private but once your in one you can get a lot of stuff there im in one myself and all the big shows and movies are no problem
check the megathread in the sidebar or fmhy