Asymmetric cryptography was a game changer, before that communicating parties had to exchange the secret keys used for encryption which was very risky.
Mastodon supports account migration. You can export the list of your followers and the accounts you follow as CSV and import them from another instance. But there’s no option to import posts yet.
Also, note that when you migrate all followers in the old account will get automatically unfollowed.
For more details, see https://docs.joinmastodon.org/user/moving
There is also joshuto, another ranger clone, written in rust.
I use ranger with zoxide plugin, very handy. I even use it inside neovim as well, using rnvimr plugin.
Covid helped that I guess.
Don’t look up!