[discreditable]

I use plaintext mail heavily. My only complaint is clients that don't support format=flowed[1] wrap text weirdly and make it look bad. The biggest ones are Outlook and the Windows 10 Mail app, though some webmail handles it poorly too. It gets bad when conversations start accumulating nested quotes.

I've found a quick tell if someone uses Outlook is if I send them a text/plain message, they'll send one back and there's no format=flowed. At that point I'll usually send them HTML mail.

1. https://joeclark.org/ffaq.html