I may have missed something, but I recall only two notable issues that happened post-update. In one, the Control Bar custom buttons always reset to the right of the Control Bar instead of persisting in a user's custom position. This was fixed within a month, but in the meantime, a much more important feature regarding persistence after customization was added. As to the drum maps, several issues have been fixed and one issue occurred, which is solvable by a workaround for now. Again, I think the benefits of the fixes outweigh the issue, which will be fixed in short order anyway
There were also some elements of the virtual keyboard that needed improvement, but they didn't impact the program and were fixed within a month. It's doubtful that all of these would have been fixed within a month if they had been part of a yearly update, because there would have been a lot more fixes needed and who knows how they would have been prioritized.
Also, if you look back over some threads that found "issues" with an update, it turned out the issue had always been there. It simply hadn't been noticed before, so the user assumed it came along with the update.
The point that often seems to be missed is that SONAR now offers
choice in the way people can use the software. Before, the choice was binary: You could upgrade once a year, or you could not upgrade once a year. Now you can upgrade when you want, download some content/no content/all content, learn something new every month or batch learning new features up quarterly or yearly or whatever, go back to any previous version, choose to pay in different ways, etc.
If someone
chooses to upgrade the same way they did in the past, they can do so. But unlike the past, they don't
have to, and they can customize their experience with the software to a greater degree than ever before. However, I think this flexibility has caused confusion because a) it doesn't have a precedent so people had a tendency to liken it superficially to things like the Adobe model, and b) I'm not sure it was explained all that well.