Going too slow on post quantum is a great way to ruin Bitcoin. We already have the exact quantum algo that can destroy Bitcoin, it's just a matter of functional q-bits, and there are enough teams trying enough different approaches that a breakthrough in the next few years, while still shocking, would not be unimaginable. All the arguing is not helping, in my mind it's a 50/50 whether Bitcoin wins the race against quantum or not. On the plus side, what a dramatic way to go.