Using New Outlook on Windows for professional communication and productivity
Then again, I'm guessing MS have 'telemetry' saying a majority of people don't have multiple email accounts, which might be right but then they will be on gmail anyway.
I think most people that don't have multiple email accounts don't really use something like outlook... if you only got one email (most of the time gmail), you just use gmail on the phone.
I think most people that use outlook (or the previous mail for windows) need some kind of email client for more than one email account.
If they don't implement this they will lose a lot of people