The way the author just degrades using email at all isn't doing him any favours imo. Sometimes there are restrictions and certain technologies need to be used. Let's say that I need to use email but need someone to verify that it's me sending the email. PGP is an easy-ish way of doing that. It's trivial to make an SMTP server to send an email as anyone you want and have that email go through down filters. If it isn't signed though, which is much harder to forge, the other user knows I didn't send the email.
Just to be clear, I'm not advocating for PGP, I don't use PGP, I could care less if email disappears. I just think the bias is detrimental to the article
I recently watched this video about note taking apps. It explains why logseq and other suggestions might not be the best options.
Tldw is:
qownnotes
Doom Emacs
Neovim