I've bounced around Google, Microsoft, and Fastmail for the last 4-5 years trying to find a sort of "holy grail" solution but I've learned there really isn't on

I've bounced around Google, Microsoft, and Fastmail for the last 4-5 years trying to find a sort of "holy grail" solution but I've learned there really isn't one. Google comes closest (for me personally), but the privacy implications and vendor lock-in always end up scaring me away. Fastmail has really outstanding mail support, but their calendar service definitely leaves a lot to be desired (i.e. if you want to share a calendar with a spouse with any sort of authentication, spouse needs an account too), and their file support is minimal. I think the answer is diversification and make sure you're a paying customer for whatever service you use. Use your own domain, spread your data around, use standard formats (text, etc.), and keep backups. Otherwise, you're just asking for trouble.