I actually like the way it works with SMF. if the quote tags get too deep, I just trim them like I would have to do in PMs back at the other place.
That's what I do. It's quick and easy. No fuss. No muss.
I really like seeing the entire context of the conversation. at the other place, you had to do a lot of back tracking if you were reading from the newest post first, and ran in to a quoted reply of a quoted reply of a quoted reply, and there was any number of posts between the quoted replies.
and that happened constantly.