I can’t comment on the regular package upgrades without more info, if it is like OS base packages or like end user apps. In any case there has being problems with major versions with changes and stuff but if it is not a rolling release distro that is very rare.

In any case I don’t agree thad service packs are the same as OS version upgrades, and if it was recently win10/11 had some very bad updates that broke people workflows and features.

I don’t know if there is any LTS distro with Wayland by default. I don’t use LTS distro nor Wayland (nothing against it, I just didn’t have a need for it so far so my lazy ass will not update). But Wayland rollout has being a disaster in any case. That is completely valid. The only thing I will say is that I don’t think that there was any distro that changed to Wayland as a normal update, was always during a version change and as such, of course, doing an upgrade with this major change probably broke a lot of people workflows. The Nvidia situation in the Wayland matter also didn’t help at all.