Purely speculation on my part, but I'd imagine that they must have had enormous "room for failure" on the UI side of things: the full screen dashboard in those

Purely speculation on my part, but I'd imagine that they must have had enormous "room for failure" on the UI side of things: the full screen dashboard in those videos would have felt super outdated on a Mac, and even on a PC at the time multimedia picked up steam there. So they would be torn between catering to the habits of their Amiga audience and leveraging contemporary UI paradigms. Go full retro continuity? Even their old users might want prefer to try something new and shiny. Abandon everything? Chances are your new UI approach just doesn't work so well, this wasn't the era of quickly iterating through a number of exploratory working prototypes. Try a best of both worlds compromise? Old hands will likely find it almost but not quite close enough to what they need to continue well-entrenched habits, newcomers will be confused by paradigms they don't know. As I said, it's all speculation, but there are just so many things that can go wrong in a transition like that.