I suppose that’s a fair point, although I thought they didn’t have access to your data in terms of email content. I agree with the point about not putting all your eggs in one basket but I’d seriously consider them for email only.

Is your suggestion to self host your email or not use email? I’m not sure why you couldn’t find a company that you do trust, and proton seems to be one of the most likely candidates.

I use the last Swype apk with network access blocked in NetGuard, because I can’t go without swipe typing. The personal dictionary still works.

I found with gboard and swiftkey the dictionary didn’t save words without network connectivity.