> It’s as thoughtfully designed as I have been shamefully unwilling to purchase the non-trial version for 80 USD.

I had to read that sentence 3 times, but while charging 30 USD/month the author doesn't think Sublime Text is worth 80 USD?

I would pay a flat amount if the product was actually appealing to me (this one isn't, for many reasons), but such a high subscription cost is insanity.

If you live in your email client then it doesn't sound unreasonable. I don't plan to look at it but it doesn't take much imagination to see there is enough value for some users.

Almost nobody lives in their email client, and if you do you should consider reevaluating your life options instead of using the "cool" client. We're only here once