Paint.net used to be an open source collaboration project by Rick Brewster, a Microsoft Employee and the students at the University of Washington. Today it is a private closed source project accepting donations, and still headed by Rick Brewster.
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).
Very different software. Paint.NET is mostly a composition/annotation tool oriented towards simplicity and speed, Krita revolves around digital painting.
I never did any digital painting in Krita, I use it only for basic image editing and it can do all I wanted to do with Paint.net. Should I care that an app can do more than what I use it for, if it stays out of the way?
I can see that. I wish Pixelmator (before it got bought up by Apple) had been ported over to Linux. That's been the closest lightweight super-intuitive alternative to Paint.net I've ever messed around with.
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.
Back when I was still on Windows(XP days), I made heavy use of Paint.net. Given Microsoft’s penchant for gobbling up smaller companies, I was always a bit surprised that they never bought the company and integrated paint.net as the built-in OS replacement for the original MS Paint.