I doubt IDE's could really do much with it -- adding and removing classes dynamically means it can answer the question "is this used?" but it can never answer t

I doubt IDE's could really do much with it -- adding and removing classes dynamically means it can answer the question "is this used?" but it can never answer the question "is this unused?" Plus there's about 4000 template languages being invented every second, that the IDE would need to not just highlight, but intelligently parse.