Take an assessment of the tools that you really need.  Think about your bank, your phone, electricity to your home, your car etc.  What's in your life that you really rely on?  What do you count on to work?  What is root level important? 

I'm to this point with email.  I'm categorizing email as mission critical.  More than anything else out there on the internet, email acts as your social security identifier.  You use it to check your bank account, log into services on your phone, pay the electric bill, buy a car, and recover passwords for everything.  Your email address is a part of whatever you are doing, and the most basic form of connecting with new people, services, clubs, schools, businesses, and jobs.  It's the ultimate fallback solution, but so often it's the primary method.

Don't you want to own that?  

Don't you want to have paid upfront for that service? 

Don't you want to be able to count on that service being given to you in a reliable and honest way?  

Don't you want your email provider to have a vested interest in delivering a quality and billable service to you?