I'd love to leave the Gmail/Outlook universe as much as the next guy, but I don't think a Google Workspace account at $8/month counts as "big bucks" does it? And a custom-domain in Office365 with Outlook is $4/month(?) for the Web-only version (without the Office suite apps). Seems like a reasonable price for reliable email.
Fastmail, Proton, and Tuta exist as well.