Same here. I back up movies worth seeing to a DVD. Even though I have a 1TB setup, of which 750GB is available for movies, with MKVs, 1TB doesn't go very far. The average MKV is about 4GB -- so that's about 180 movies. Not too many at all.
The last thing I want to do is span these oversized movies over 2 DVDs via WinRAR or some such nonsense. I just wish the scene would use 4.37GB as the hard limit and split the movies up accordingly. Nobody puts out 1400MB divxes, right?