Very good question. Greg.
We all know a Scope lens would cost several hundred dollars, or more and a lot of collectors probably have one (I have several) BUT a lot of collectors DON'T have one too.
If I was releasing NEW films, I would NOT do scope, because it would restrict the number of viewers, and sales. Although I have heard of some people without a scope lens buying scope features and watching them " stretched ". Business wise, making a flat and scope print would not pay-off either. There just isn't enough collector's coming forward to make it worthwhile. And EVERYBODY can view a " Letterboxed " print with no problem. So, if you can afford a scope lens, GREAT!
I've got a few scope films - IT'S A MAD,MAD,MAD WORLD ( 800 ft. Digest ) , SUPERMAN 2 ( 1200 ft. Digest ) and DAY OF THE TRIFFIDS ( 1600 ft. cut-down feature ) .
And in 16MM , just one feature - THE FALL OF THE HOUSE OF USHER ( 1960 - Vincent Price ).