The funny thing is that I've been working on a SMSC/MMSC related project and have a little insight on MMS (yes, it really is a mess and a good candidate for cruft). Anyhow, it was interesting to see the scales on a provider's level. I knew MMS was a minority compared to SMS but it turns out the question is not by how much, but by how many ORDERS OF MAGNITUDE. Seeing this I fully understand why someone would let MMS (and the things it requires) die and rather spend that time on something that will actually improve the experience for ALL users.