[pvg]

still have not matched its amazing functionality and UI

This isn't because people just ignored or forgot Hypercard - similar tools just evolved in many different directions and many of them were much more popular than Hypercard. FileMaker, Access, Visual Basic and their ilk come to mind; the current crop of 'no code' tools are also distant descendants. A key difficulty isn't replicating the UI, it's coming up with a tool/system that's both accessible to non-experts while also providing a smooth 'power curve' to the more sophisticated features of the platform. Without that, motivated beginners quickly run up against the limitations of the built-in functionality or a big jump in conceptual and practical complexity.