The 9 -> 10 -> 11 upgrades are allowed to make breaking changes. I have apps running on 11 that i can't upgrade further without significant work, because there

The 9 -> 10 -> 11 upgrades are allowed to make breaking changes. I have apps running on 11 that i can't upgrade further without significant work, because there are things that were retired in 12. To me, that means those changes are major upgrades. pron's article says that there are no major releases, only feature releases, and that may well be the terminology the project uses, but that terminology is pure mendacity.