I used CSP before I used Krita, like in general, because it was a free software for my Wacom Intuos Comic as a bundled software (that was about 4 to 3 years ago, so when I didn’t know anything about that whole FLOSS topic). I currently try getting to know Krita more - I stopped back then after a short time when I had started digital painting because the software was very confusing and my PC that I had was very weak.
Some time ago (mid 2018), having a better PC and knowing a bit more about digital art, I wanted to try Krita again because I felt it had things that CSP didn’t (e.g. more brushes and options for them, better engine for watercolour-brushes, more filters) and because I wanted (and still want) to have a free alternative to CSP, in case that I would have to buy it again. The only reason I bought it after the 2 years from my bundled code have expired was that I got a discount from the bundle.
I guess I still enjoy drawing in CSP is because I can do sketches and lineart better with it. I can’t explain it. It just… feels better? I don’t know. Maybe one part could be the stabiliziation that I get along with better in CSP than in Krita (in Krita, I always use the Dynamic Brush Tools but sometimes it still feels odd) or that the brush I use for lineart works better in CSP than the recreated one in Krita.
But I really can’t explain the whole of it. I’m sorry.
CSP has vector layers and good tools for them, yes, but I haven’t used that software in a long time, so I didn’t use them for the lineart in my piece. In fact, the vector layers were a reason for that but they aren’t anymore.
(CSP wasn’t my first drawing software. Before I had a drawing tablet, I used MS Paint Paint.net FireAlpaca/Medibang)