I needed a screenshot software when I moved to Linux Desktop last year.

Flameshot (despite being available on Windows) helped make that transition really pleasant! I mentally put it in the LINUX HAS BEEN GOOD column.

That's actually how I found it too, the drawing and annotations were just the cherry on top

I have wanted this for ages, didn't know Flameshot did this or I would have tried it much sooner. It's the only thing missing from any screenshot utility I use.