My personal concern is the smartphone. Apple concerns me less than Google, but not by much. Android has the better potential for full, verifiable independence-from-the-Mothership (via LineageOS, GrapheneOS, F-Droid, ...) but it all feels early, amateurish, almost like an ambitious project that advances only when capable strangers volunteer their spare time.
Because that's literally what those projects are.
It's the end of the weekend and I want to go so deep I don't even know if I'm being sarcastic anymore.
Here is an example for Google: https://superuser.com/questions/1135339/cant-block-connectio...
It works pretty well and as I have setup NextDNS to be the DNS resolver used by my access point, the family get the benefits of it without knowing about it. On the mobile, you need to set it up as VPN, this adds clutter in the notifications area, my kids do not like that.
Occasionally I like to fake wild conversations and go to completely out of character sites and locations just to throw their algos and tracking of me off. It's the only real way I can protest any more. :/
I also use the three technologies you mentioned. Fast mail has been great.
But yeah, I'm also phasing out my google usage. Personally getting off gmail and professionally migrating off firebase and already refuse to work with GCP in any capacity.
Something like Lockdown on iOS (works nicely even on unrooted devices like mine.)