I’ve got Fastmail set up for myself (more tech savvy) and for my wife (it needs to ”just work” and easy like Google), and I’d say it’s a solid balance between wanting to do a bit more with the email and a rock solid just works email. At $5/mo (or $50/yr) per user, it’s not cheap, but I think the service is quite good and I’ve been extremely happy with the service provided. I also never have issues with SMTP access for my home server, I don’t think my mail has ever been sent to spam for any of my family or even sending reminders to my work email.
Their iOS app has also replaced the default / native iOS mail app because it’s just that good, which is a nice plus.