Re: Next-gen?
Since case-insensitive is the default setting for HFS+, what is it that you think makes it "not work (properly)"? Locale handling? Honest question.
Yes, there are issues with HFS+, mostly just showing its age. Not sure anyone is going to argue with you there. But whatever follows it is sort of by definition the "next-gen," at least for Apple.
ZFS appeared to get canceled by Apple's legal department, not because of technical issues.