Yes it’s good to maintain a healthy dose of skepticism and I could (more than likely) be equally wrong, but I hope my comment encouraged others not to take comments online at face value always.
For what it’s worth, I signed up to fast mail yesterday, onboarding vs my cloudflare managed domain was a breeze and so far no issues (it’s email hosting (and their iOS app isn’t great), so there’s not much to get excited about on a day to day basis - apart from a long term appreciation of privacy first email).
I have just started using the Spark Mail App - now that I am excited about…if it lives up to its hype, it will be a great addition to my workflow.