I'm finding Gmail to be most difficult to transition off of. I do have personal domain and use Zoho with it, but I think there is this mental block.. It will happen..
Edit:
I am also using my personal domain instead of @fastmail.com You never know when / if you need to leave a service provider again, and you don‘t want to change your email address again.
I would gladly pay a subscription fee if it means Google isn't reading my emails to sell me ads.
Their service is excellent. You get answers from real human beings within 24 hours (unlike trying to get help for Gmail; won‘t work).
One time my friend was driving and he asked me to navigate. The exit was coming up, meanwhile I'm stuck trying to get OSM+ to understand what rounte we are on. That was an unpleasant few minutes. Despite trying to stick with it, such moments kept coming up again and again. It made me realise that Maps is mission critical to me.
By contrast, Gmail was easy. Fastmail ftw, forward all google mail to it, and the fact that most of my email use is work email, which is on its own domain anyway.
What I would like is a hardened, privacy focused distro of Android that is guaranteed to be independent from Google. Sounds like a tall order but here's hoping Samsung will come up with their own mobile OS although how unlikely this will be.
Samsung have not demonstrated being any more user friendly than google in my opinion. My S6Edge ran out of OS updates about 3 years after if was released. I have iPhones several years older that are still getting updated to the latest iOS. And there’s a whole bunch of crap undeletable Samsung software on their devices that I trust even less that Google’s apps.
Current strategy is to only have a burner google account on the phone and rotate gmail accounts every year (on phone refresh). Keep personal google accounts off the phone (using linux desktop) with a vpn and in firefox with privacy settings.
Use containers on the browser - never mix google, whatsapp facebook and other activities.
Use a phone registered in EU for privacy settings. Use a paid burner gmail account (again I figure it is better for privacy).
Annoyingly I also need an iphone for i-message with family members.