The entire reason Google's products are as big/ successful as they are is because they are free. If they started charging for Gmail, the rush to the exits would be instant. If Google started charging for Android OEMs would switch to AOSP, China, Amazon, and Microsoft would ensure a supply of free Android versions.
Apple is able to charge people for their services more-or-less up-front. Google has to wrangle fickle OEMs.
Convenient is the more apropos word.
I’m a Google One customer... I came for the drive, but I’m stuck because of the nearly 15 years of GMail and the pain it would take to clean up!
I can't see how charging for search would work, charging for Android, they already charge for handsets but it's easier for Apple because of a closed ecosystem, I doubt they could charge for Chrome, so I'm a bit confused.
Ads are an incredible cash cow and an amazing business, but there are all sorts of other ways to monetize that business.