Does anybody really think that UCS-2 is a good idea anymore? Or that random indexability by code point is all that valuable, in a world with combining glyphs an

Does anybody really think that UCS-2 is a good idea anymore? Or that random indexability by code point is all that valuable, in a world with combining glyphs and bidirectional characters and whatever other crazy stuff Unicode has? If you just want an upper bound on the number of bytes needed to store n code points, then (a) that's probably not a particularly useful question to ask, and (b) if you assume that 32 bits is enough for any code point, then the space taken by properly-formed UTF-8 is bounded. So, why would they want to store things internally as UCS-2? Or rather, why should they?