I knew the Amiga was pretty close, but in the grand scheme of things it’s somrthing of an also-ran (sadly). I didn’t know the exact years for the Amiga though.
I was thinking of MS world. Windows 3 wasn’t until 1990. You could argue it took until Windows 95 for most everyone to go GUI.
The Amiga was '85. It did take a while for PC-compatibles, of course.