https://krita-foundation.tumblr.com/post/621253203762331648/...
Getting a cross platform UI to work consistency is an impressive challenge to meet.
Getting cross platform press-quality print support working reliably, seems like another one of those terribly hard problems.
I just installed Krita after getting a 2-in-1 with active pen support, hoping to get into digital painting.
I've used GIMP and Inkscape extensively over the years, and used the printing functionality a lot.
In fact, whenever I want to print something of exact size, I'd use Inkscape.
I searched for any more information in the issue tracker. The closest I could find was https://bugs.kde.org/show_bug.cgi?id=378769 , which might be a concern but not really for desktop printing.
We actually removed PDF export because there's no good libraries to handle PDF cmyk support.
So I think this touches a core problem of open source: The average hobbyist does not feel this itch, hence can't scratch it. You need someone with good understanding of the printing industry, maybe access to professional printing hardware. Hard to do on hobby time or as a lone programmer. This is an example of a whole class of problems where OSS tends to do worse than the industry average.
BTW, it pains me to say this as a regular user, krita is very good software.
Like, one every two, three years.
But I happen to have a personal stake in this discussion. I'll cite my post from 3 days before this about a little project I was doing:
I took screenshots [...] cleaned them up with krita.
About every parent at our school prints a lot of little things for the kids, to color or play. As computer nerd I get questions about good program for X, and recommend e.g. paint.net, photopea, gimp, ... For my public, not printing seems a blocker.
So if you get these requests once every 2-3 years, some part of your potential audience seems missing.