I added a new "Encryption has a shelf life" section to the Caveats section of #Spritely Golem's writeup. It's an important point I hadn't called out previously! https://gitlab.com/spritely/golem/blob/master/README.org
> Encryption has a shelf life. In general, secure ciphers from about 15 years ago aren’t secure today, so it’s possible that chunks that are currently only readable by intended recipients can eventually be read by anyone who gets their hands on them. [...]