I suspect it's probably going to be a while unfortunately. I'm all-in on Open Source, there's no way I'm moving back to CSP, but the lack of vector drawing in Krita has driven me to learn more about Blender grease pencil. It's got both some really amazing features and some frustrating limitations as well.

Truthfully, CSP is also not quite everything I would want out of vector tools, it's just closer. What I've been interested in for a while and haven't been able to replicate is drawing in multiple passes: draw a stroke's position, then its thickness, then its strength, then its velocity, all as separate steps.

CSP sort of has this; you can redraw vector strokes (or at least could last time I used it), and it was great. But I feel like it could be taken further and I feel like it's an area where there could be a lot of innovation beyond what CSP even allows. But I don't think there's consensus yet from the Krita team about what direction they would want to go, and to be fair, I'm not sure I would be able to answer that question either. I'm not sure just copying CSP would be the right move, I do want to see more actual experimentation in that space beyond just vector layers -- like ideally I'd like to be able to do multiple-pass strokes in paint layers too?

But it is a really big weakness of the app right now, I agree.