[chexum]

pass is great for availability, I think I have several friends even in other countries (if a VPS wouldn't be sufficient) that would lend me space with a shell account for a "pass git push".

Of course, the gpg key is an issue, just as well the password or the ssh key for those accounts. In addition to passphrase2pgp, you could also use paperkey and keep it storage and/or a bank safe. I, for one, store my GPG key on a Yubikey. Of course, I would have thought I'm storing it safely, but it's left in my laptop for a few days now, so chances are I would simply leave it there in an actual emergency. However, pass also supports (re)encrypting with multiple keys, and one more Yubikey can then be kept with friends/family, and it can also store backup SSH keys.

Having multiple copies of ssh and GPG keys and the passwordstore git repo, chances are great to be able to recover most of the online presence.

If a phone/tablet itself can be saved, it could also host another mirror of the GIT repo (for example with an app like Working Copy), accelerating recovery.

paperkey: https://www.jabberwocky.com/software/paperkey/