@chriscunningham @mcc Especially Google. I *really* need to move off my (still free) business e-mail accounts (they changed the T&Cs to make historically free accounts non free for businesses, but I'm not using mine for commercial purposes). Functionality changes you can't opt out of *even if* you pay them money.

The most important question is how easily your data can be transferred to an equivalent service.

My business advice would be to never sign up to anything where data export isn't included free of charge in your contract. It doesn't have to be already present, but it has to be free, and well defined as to what and how it will be exported.