I am in my fifties now so tend to think these things are a bit late for me personally. But I would be happy to spend my twilight years with a "normal" metabolism. However, I DO think this is a good move because for a change they are looking at the underlying mechanism, which is the autoimmune problem. In my lifetime, there has only been progress in testing and insulin delivery systems really; it seems 99% of research focuses on blood sugar control. But Type 1s also get other autoimmune problems, such as hypothyroidism, rheumatoid arthritis, joint problems, etc. Those are not necessarily the RESULTS of high blood sugars. They may just be correlated with high bloods because the autoimmune attack and associated inflammation makes it harder to control blood sugar.
So this is a better approach, from my point of view, and it bodes well for my extended family and any grandchildren I may have.