Comment by dangrossman

I have no background in crypto stuff, but the main issues seem to be (a) SSL virtually requires buying certificates so small/hobby sites won't use it, (b) it involves multiple round-trips and latency is never going to go away unless someone invents faster-than-light communication, and (c) part of what makes encryption work is that it's computationally hard on today's hardware; when it's not, we move to a different algorithm that is, so the computational cost to using encryption versus not using encryption will always be there.