Apple is a for-profit company and their lacklustre hardware sales (relative to the past, and the current competition) will incentivise them to pivot to ever-more intrusive services.
Self-hosting everything apart from email is an option for privacy-minded individuals.
And tbh, if one was absolute in their praxis on privacy, they would roll their own mail server (but a full mail stack takes a lot of effort, not just a MailHog instance)
Proton still conform to governmental requests I believe. FastMail is also an option.