Somewhat tangential, but I wonder where do people using their own domain draw the line.

I personally use a "stable" firstname@lastname.com for supposedly trusted, long-term services (e.g. bank, utilities, etc.) and for services that require my identity for obvious reasons (e.g. shipping/billing address).

For sites where I prefer not to reveal my identity (not even to the site operator), I use Fastmail’s Masked Email (akin to iCloud Hide My Email). This, however, means I don't own those addresses, and if I need to change email provider for whatever reason, it's a PITA to update the email address field on possibly hundreds of sites (assuming you can).

I could buy a domain like randomstring.com to use with catch-all, but then I would be more likely to be tracked across sites, especially in the case of data leaks (which do happen eventually).

Then there are those awkward in-person situations when somebody asks my email and I have to say firstname@lastname.com.

What's a good tradeoff?