Familiarity instead of compatibility.
This piece of documentation from forgejo, about how their actions are mostly github actions compatible is how I feel about this or similar endeavors.
I really like KDE, because it's familiar enough to Windows users that they can just kinda use it. Many of the shortcuts are the same. But I've had a bad experience with things that try to emulate Windows more completely, because people begin to expect some windows idiosyncracy or some other thing to be there. And then they get frustrated when it's not the same.
KDE manages to be "close enough", which results in a better experience.