[josteink]

with fastmail I'm missing out on the growing gmail ecosystem (Streak, Dropbox mailbox app, others).

While I have no doubt a better ecosystem around would be appreciated by some, the ecosystem thing as a whole is a double-edged sword.

I personally fled the Google-sphere because I felt I was gradually getting locked into something non-standard, non-portable.

These days I'm very hesitant to using non-integrations which aren't strictly needed. For instance: I prefer to create a proper user-account over "just" signing in with Facebook or Google.

I properly own my own domain and email-address. My Google or Facebook-account not so much.

Edit: To be clear, the value-add for me is that fastmail isn't some non-replaceable thing tied to an ecosystem, but a standards-based service provider which I can mix and mash with other best of breed-services as I see fit.