I'd change to "Not enough Gmail users are leaving over (just) this yet".

Yes Gmail is big enough and popular enough that any one change that pisses off a small chunk of their users won't kill the juggernaut, plus any any one thing like this is so small it won't change someone from a lover to a hater overnight, but gradually users do either find they dislike a product enough to move to one of the many much better paid but cheap options, or to one of the differently-flawed but perhaps now preferable rival free options, and gradually the users who make business decisions of whether or not their company uses Google's business suite also may find that the next time they need to make a decision, little annoyances in Gmail are the thing that tips them into considering putting a business on something like 365 instead.

Personally I'd like to see more and more smaller companies that really specialise and excel in their one area without either bloating into trying to do too many weird things (cough Mozilla) or being acquired by Google/Microsoft etc. but I've not always been good at voting with my wallet due to the convenience of for example having a single Microsoft license to cover everything from the Word license somebody wants to their custom domain email hosting.