I have used/owned the macs at various points in my life. The user interface has remained consistent over the years, but it has poor usability compared to even Gnome due to the accompanying legacy baggage.
Here's an example. Closing all document windows doesn't close the app. This is a design decision from 1984 (at which point we knew far less about the usability of Desktop UIs than we do now) which imho hasn't quite aged well. What's the point of keeping an app open without documents? Most people open docs from the File Manager or Desktop (which might load the app as well if there isn't one already running). And not by going to an inactive app (with a hanging toolbar) and then doing File -> Open.
Here's an example. Closing all document windows doesn't close the app. This is a design decision from 1984 (at which point we knew far less about the usability of Desktop UIs than we do now) which imho hasn't quite aged well. What's the point of keeping an app open without documents? Most people open docs from the File Manager or Desktop (which might load the app as well if there isn't one already running). And not by going to an inactive app (with a hanging toolbar) and then doing File -> Open.