Never put companies on a pedestal.
Before Larian, it was Bungie, BioWare, Rockstar, Bethesda, CD Projekt RED.

RARBG really left a big hole in my heart.

Snapseed and Lightroom.

Nobara is my choice. It's based on Fedora, which is a very solid base already, and Nobara adds numerous fixes that will save you days if not weeks of headaches, especially if you have an NVIDIA GPU.

Upvote should working as intended now, if I'm not mistaken.

Will there be kbin support in the future?

Unfortunately, that's the only truth. Especially if you live outside the US.

Yes! I use Inoreader on desktop and mobile!

It's not an app, it's a website that resembles an app. Apollo, specifically.

I'd love to have everything in FLAC for preservation's sake, but I've settled for Apple's QAAC. Great quality, small size, universally supported.

Closest thing I know is Fedilab, which works with Mastodon, Pleroma, Pixelfed and Friendica. While compatible with each other, each fediverse service uses different parts and features of ActivityPub (the protocol they all share). It's technically possible to build an app that does it all, but doesn't really sound sensible.

I suggest you convert them to AAC with Apple's excellent QAAC encoder instead. fre:ac can do it just fine once you add the encoder. Much better and more modern format than MP3, and still universally playable.