[caspar]

Really?

I've been a fulltime Linux user for years but there are tons of excellent Windows-only apps.

Here are some that I miss: Directory Opus, ShareX, Wiztree, Everything, AltDrag, AutoHotkey, Paint.NET, irfanview, SumatraPDF. I'd add Keepass2 as well but fortunately KeepassXC is a thing.

Those are all feature-filled (in the bloat-free good way) and they've all been around for over a decade (from memory). Most are free and open source to boot.

[LeFantome]

If you like Paint.NET, you may like Pinta on Linux.

Also, I am pretty sure that SumatraPDF is available for Linux as well. I am not at a computer but I think it is in the AUR.