I'm not defending MS, but it's also not that they went and intentionally (and suddenly) introduced box-model incompatibilities, that's just not the whole truth.

I'm not defending MS, but it's also not that they went and intentionally (and suddenly) introduced box-model incompatibilities, that's just not the whole truth. BTW: I've recently found this MSDN blog with explanations on some of their decisions (https://blogs.msdn.microsoft.com/oldnewthing/ https://blogs.msdn.microsoft.com/oldnewthing/)