For me, it was perhaps simple-scan, a very simple and efficient GUI to scan documents. I used it with my Brother printer / scanner and it works like a charm. Especially since I do not scan stuff often, so a program with more complex UI would have the effect that I forget how to use it until the next time.
Bitwig. I’m moving to libre tools like Pd and Ardour, so I didn’t renew my license. But it works just like it does on Mac.
Except that it supports touch screens on Wayland, and you can’t do that on a Mac.
I’ve tried Ardour, but compared to Reaper, I unfortunately just can’t use it. Pd is fantastic though!! It’s what got me interested in music stuffs in college, man those are memories… making a drum kit in Pd was my first assignment, I remember suffering over the cymbal for hours and hours. Now I’m getting all nostalgic lol