As far as I could tell, the big pain point was performance -- they were just too slow on median machines during the late 90s/early 00s window they had mindshare.
I actually enjoyed using them to get around a few browser limitations around the mid-to-late 00s, and they seemed feature/performance competitive with Flash unless what you were doing fit the media authoring model closely. But by then people were skeptical about Java and if you had to do anything to get it installed they wouldn't, and the direction was native web.
I actually enjoyed using them to get around a few browser limitations around the mid-to-late 00s, and they seemed feature/performance competitive with Flash unless what you were doing fit the media authoring model closely. But by then people were skeptical about Java and if you had to do anything to get it installed they wouldn't, and the direction was native web.