Nothing, there is no reason to put that much RAM on your system if you don’t even know what to do with it. “What is someone who only uses his car to commute supposed to do with a supercar?”

I don’t have any of those problems but I use office suites very rarely and and I’m on linux.

About the autopudate, you should use winget instead of having each app check for updates or having to it yourself for every app.

I do think libreoffice looks old and has room for improvement, just not so enough for me to look for an alternative. I have read that onlyoffice looks better, but I have never tried it.

Yo he usado manjaro, arch y actualmente uso artix en mis dos computadoras. Manjaro descártala, artix por lo general funciona bien pero eso de que no tenga systemd llega a genrar problemas dependiendo el software que uses. Arch nunca me dio ningun problema que no se solucionara facilmente o mo fuera culpa mía.

Cleanbuild means not to use previous existing files, the numbers are exemples of a selection of which packages to cleanbuild. ^4 means all but number 4, the others I think are self explantory