Actually, this is based on my personal experience. I don't use a smartphone for internet. Many of the places where I've tried it, the "free wifi" doesn't work. Maybe the wifi is there, but the uplink is 2G speed, or it has a web sign-in that doesn't work any more. Or maybe an employee accidentally unplugged the router. Days/weeks ago. And "no one complained about it".

I've traveled Greyhound and Amtrak recently. They both advertise free wifi, but it's quite clear they no longer prioritize keeping it working.

Libraries are (probably/hopefully) an exception. But, seeing as Starbucks has been wanting to discourage people from hanging out in recent months, I wouldn't count on Starbucks wifi being reliable.

I was gonna say - the public library wifi is up to this task.