I guess more digital art options on Linux are always good, but that aside, is there even a good reason to use it when something like Krita exists? It's always worked flawlessly on my linux machine (Mint).
I use Krita, but I miss Paint.NET
It’s lighter, simpler, and faster with a much more intuitive UX. for basic image manipulation tasks it’s awesome.
For creation of art I’d use Krita, it is more feature complete. But if Paint.NET appeared on Linux, I’d use it in a heartbeat.
Paint.NET is closer to Gimp, but usable.
Paint.net is my go-to image editing software. I'm not a digital artist or professional photographer, I just need to downsize/crop/adjust the occasional image. I don't need the kitchen sink. Regular MS Paint is annoyingly basic and Krita, GIMP, et al., are too much UI-wise. That said, I use Linux daily but not for images so not sure if there is a Paint.net analog on Linux already.
I'd reverse the question and ask is there any reason to continue developing in .NET and windows-only languages when windows allows for WSL apps.
Very different software. Paint.NET is mostly a composition/annotation tool oriented towards simplicity and speed, Krita revolves around digital painting.