I'm not entirely sure that rotational cameras are less flexible or have fewer features, and I'm sure Seitz (who make the Roundshot) would disagree with you. They're harder to hand-hold, it's true, but what other features are you looking for?
Originally Posted by DrPablo
Also, given that Seitz has made a 6x17 scanning back camera (at about 28,000 euros) as well as digital rotation cameras, I rather suspect that they could make a swing-lens if they wanted. I don't know of any digital swing-lens cameras, though. Perhaps AgX can enlighten us further?
The only swing-lens I've ever used was a Horizont belonging to the Supreme Soviet (which show how long ago it was). It was awful. But even if it had worked, I don't think I'd have wanted one. They're very much love-it-or-hate-it.