To that point, QuickDraw is still shipping in MacOS although it's officially deprecated. Pretty impressive for an API that began life in 1979. I will dock it for never supporting more than a 1-bit transparency mask, but Atkinson had left Apple before that became important. I think he quit around the time Jobs was first fired.

He made HyperCard on his own and licensed it to Apple for cash, though he stipulated that they had to release it for free. Unfortunately, HyperCard's biggest legacy is only Myst, and the Tim Berners Lee shout-out.

HyperCard has a much bigger legacy than Myst: it inspired how Web browsers work, including the overall navigation look and feel, JavaScript, even the hand pointer! It's one of those super influential things that most people don't know about.

Never mind all the people who started out their programming careers tinkering with Hypercard.

Guilty as charged. HyperCard was a super fun environment to play around in and really easy to make simple games in. It was great for luring people deeper into programming.

I think it was removed in 10.15, as its tied to Carbon.