It takes a lot of brains, time, money, failure, and just plain screwing around to come up with something like Hypercard or even the earliest personal computing

It takes a lot of brains, time, money, failure, and just plain screwing around to come up with something like Hypercard or even the earliest personal computing systems. FOSS doesn't allow the time and money part, which is why they are stuck in making "open" tools for advanced teletype emulation. It is not a coincidence that Atkinson made this as an Apple fellow, where he had resources to work on whatever he wanted and could make whatever demands he wanted (and likewise not surprising that Apple could never make HC "profitable")