Whatever works for you, but I don't believe that your mail flow on the Mac is "effectively unchanged for 20 years".
Wikipedia lists many UI and functionality changes over the years for the Mail app.[1] As recently as this year, people are upset about changes in the Mail app in recent versions.[2]
Wikipedia lists many UI and functionality changes over the years for the Mail app.[1] As recently as this year, people are upset about changes in the Mail app in recent versions.[2]
[1]: https://en.wikipedia.org/wiki/Apple_Mail
[2]: https://www.macrumors.com/how-to/get-old-apple-mail-back-ios...