This is where you and I are going to disagree.
Actually some vendors won't move until there are no more supported
releases that still have Folders and QDLS.
Actually these vendors don't care if you ever upgrade. As long as you
continue to baa like sheep and pay their maintenance they're happy.
They would prefer it if you never upgrade. That way they won't ever have
to upgrade. Even then they probably wouldn't upgrade. They would
probably rely upon some customer saying we've got it working on the new
release with no new issues. That way the vendor can keep chugging along
running their 270 at V4R5.