@liaizon yea sorry, that wasn’t really well spelled out.
IMHO aiming for 100 years stability is a bit of a sisyphusian task, especially if you aim for adoption at the same time.
My ssb reference was aiming for the fact that while it does have much better longevity (no need for domains & self-contained PKI) it also still is way too arcane and inaccessible, like a pocket dimension.