Old Yahoo! Mail Vs. Yahoo! Mail Beta

What do you guys think about the Yahoo! Mail Beta? Should we completely move to the new layout or should the option of using the old & new layout always be available to us?

I've been using Yahoo! Mail for years now and I've always been into the classic layout. In fact, it's the only reason I hadn't completely moved to Gmail! I've tried switching to Yahoo! Mail Beta several times but I had to switch back almost immediately because it's just too difficult to get used to. I might switch permanently when it's off the beta stage but I do feel the option of switching back should always be there.