Your comments are unintentionally misleading people, see vmception's comments above.
Yes, to get the space/validation improvements you can get from schnorr you need interaction. But it's perfectly possible to use it in the same way as ECDSA, it only adds options, it doesn't remove them. For some applications the requiremetn that the participants isn't a big deal and they can enjoy those benefits, otherwise they don't.
Yes, to get the space/validation improvements you can get from schnorr you need interaction. But it's perfectly possible to use it in the same way as ECDSA, it only adds options, it doesn't remove them. For some applications the requiremetn that the participants isn't a big deal and they can enjoy those benefits, otherwise they don't.