I too like the portability, but you should have a way to get import old keys in a way that is very trustworthy, but that also has you create a new key for all f

I too like the portability, but you should have a way to get import old keys in a way that is very trustworthy, but that also has you create a new key for all future stuff. Over time you could accumulate keys from the past that can be used to access archives, but you compute forward with a new key. Basically the tools should promote active and regular key rotation without losing your old ones.