[modeless]

You forgot about the most important advantages. True write once run anywhere cross platform support, and one click zero install distribution with no gatekeepers. The latter in particular is key and impossible to replicate any other way because device gatekeepers like Apple or Nintendo will never allow any other app platform to bypass their distribution monopoly.

[QwertyPi]

> True write once run anywhere cross platform support, and one click zero install distribution with no gatekeepers.

We had (have) that, and the apps were miserable to use for the same reasons enumerated above. The place where it has come closest to succeeding? Video games.

Unfortunately, platforms are too diverse to target as a generic platform without making major sacrifices as to either consistency or usability.