I'm 6'4" and wear size 13 shoes. I love that big boards have become a thing, but I feel bad for people who want skinnier boards and can't find them, I've read that book before. I remember searching for 8.25s at shops in the early 2000s, and now I can find 8.75 at most shops, It's amazing.
I hope that since the new norm is everyone will have their own board company, different companies will carry different sizes so everyone will be covered.