> Email is not plain text any more. We can't pretend that it is or should be.

I send plain text emails and this is a hill I will die on. :-)

Do you not contribute to the development of any open-source projects that only accept patches via plain text emails sent to mailing lists (e.g., many GNU projects)?

Here's a tip for anyone who sends plain text emails, or wants to, and has to deal with annoying normies who complain about undesirable wrapping[1] when viewing plain text emails on mobile devices with small screens: configure your mail client to allow lines in emails to be up to 998 characters[2], which is longer than any paragraph you will likely write. I did this for my work email years ago.

[1] https://www.arp242.net/email-wrapping.html

[2] https://datatracker.ietf.org/doc/html/rfc5322#section-2.1.1