A while ago there was a post on mailing list someone wanting to know more about the history of NetBeans. Reading it and the FAQ about the Lookup made me think that there are a lot of old APIs that ware replaced by better, faster, .. ones. But the fact is that the older APIs are still used today.
I'd like to see them get deprecated and also removed from the sources. In this way we would get a clean codebase that would be smaller, faster and easier to learn.