[bruce511]

Thats not exactly a new question. Netscape would also like an answer.

Obviously the short answer, for you personally, is "nothing". You cannot affect either the closing business or Google.

The somewhat longer answer is that there are certainly other mail services that currently exist. So there are still options. And yes, those services will need to differentiate their offering.

[Some will no doubt mention the option to self-host. I did that myself for about 15 years. It's a lot of extra work to do that though.]

Obviously some services (like YouTube) are double-sided. Consumers go there because producers are there and vice versa. But, as you point out, even there you have choices - free with ads, or subscription. (Not that you'll get any "customer support" from Google.)