It caught on during the 80 and mid-90s, Object Pascal was originally designed for Lisa and MacOS OS development, before Borland, TMT and others adopted it.

But then Borland decided selling Lifecycle tooling to Fortune 500 was more interesting than small developers.

Delphi and C++ Builder are still around, unmatched in several of their RAD capabilities, but a couple of generations were lost, even if now they try with the community editions.