i think those frontends you mention made money because they had defacto monopoly on a certain platform or kind of experience that was unavailable anywhere else. xcode is a piece of absolute crap but i still have to pay $100 a year or whatever for it.

perhaps the emergence of web standards - both JS and browser standards - killed frontend. when everyone can build their own tools that run everywhere, and the browser api's are often pretty good, then why buy instead of build, or pick the next one that is free and good enough.