I use HME addresses for new sign-ups (when feasible) and still have quite a number of individual addresses set up!
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It's not a big deal as I don't do many sign-ups.
Okay so if I understand correctly, you’re using HME as the complete replacement for the old system. Honestly, I haven’t fully looked into how it would work for me to recreate the former glory of revocable, anonymous per-site sign-ups.
Are you basically achieving that with Apple, but have to use an Apple email client to do it?
I usually use Outlook for email on desktop or laptop (many years of using it, through numerous iterations, makes me reluctant to move). But end up having to use something else for HME - I use Mail on MacOS - as I already did on IOS and iPadOS.
I still use various email clients. What I meant to make clear was that my mail server was now google infrastructure (through Google Apps for Domains, though that now has a new name). It doesn’t allow unlimited aliases.