For Gmail if you mean a lock on consumers who generally don’t pay for the product I would agree, but I have done more g-suite to Office 365 in the past 12 months than I have in the past 5 years. It is too bad because we could really use some competition and different ideas in the office productivity space.
I left a job when the previous notes admin left and they tried to get me to run that hot garbage with no training and no bump in pay.