Is Apple email service any good?

I want to move away from Gmail and looking for alternatives.

The enticing part with Apple is that I can get 2TB of iCloud AND *custom* email domains for only 9.99/month total.

Do they do spooky stuff with their email service? Should I avoid it? I was looking at Proton before, but I saw multiple users on this subreddit saying that Proton are not as privacy oriented as they claim to be.

Would appreciate a detailed feedback for Apple email …

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