TL;DR; Three points:
Make note of your friends phone numbers, emails and addresses (not just via social media), especially the ones from earlier years, and keep track of them with regular calls, notes or visits. Forty or fifty years from now, after the cycles of graduations, weddings, babies, moves, etc. you’ll have some golden relationships.
Joplin with a WebDAV server (for me it’s Infomaniak’s kDrive) provides syncing across multiple devices and is pretty much transparent. You should just force synchronize when leaving one of the apps to be sure (kind of like the save button in most programs).
In my mind, Veilid (https://veilid.com/) is trying to solve this exact problem.
It’s only been public since the last DefCon, so it’s a little raw at the moment. That said, it is also only a framework - specific applications need to be built.
See also their Discord: https://discord.com/channels/1077244355439509565/ and GitLab: https://gitlab.com/veilid/
Don’t Look Up - https://www.rottentomatoes.com/m/dont_look_up_2021
Sort of summarizes the total shit-show that current politicians and billionaires are responsible for.
A little saddened because I sold Bitcoin way too early. I wanted to get out, but if I had set the bar a little higher… Of course, if you had a crystal ball you could make a lot of money.