Obsidian and Calibre both work on Linux, no problem.

CapCut has a web version, plus you probably use it on your phone anyway, right?

DiskDrill doesn't have a Linux version, but honestly when's the last time you needed data recovery? There are great Looking based options when you do.

AllDupe/FileSync don't have Linux versions, but what are you actually using them for? There are tons of alternatives (dupeGuru for duplicates, Syncthing/FreeFileSync for syncing, or privacy options like Nextcloud). Just depends what you need.

You'll be fine switching over! If you think of any others essentials we didn't discuss, let me know.

Linux takes a little preparation and some getting used to at first, but once you Linux, it's very hard to go back. I've been using Fedora since 1999.