A lot of the other "cures" involve immunosuppressants which have a ton of bad side effects that can be worse than diabetes.
I'm optimistic about the VX-264 approach of islet cell encapsulation. Even if the encapsulation eventually breaks down, using stem cell derived cells (rather than cadaver pancreata) means you could simply replace the implant after a few years.
Maybe one day it could be made into a infrequent injection? Like if you just had to get a shot from your doctor every few months, perhaps that would be easier patient compliance. There was some new hiv preventative that recently demonstrated something like that, I wonder if the technique could be repurposed or not.