My counter anecdotal example is that this never happened to me or anyone in my social sphere after 10 years of Uber rides, but phone number blacklisting happened to almost everyone I knew. /shrug

In SF, there really isn't "another cab company" other than Yellow Cab.

To echo the parent, they may have been unethical and borderline illegal about scooping marketshare from cab monopolies, but there were no complaints from the consumer.

...flywheel?

I use Flywheel and taxis occasionally: red lanes usable and curbside already available pickup at SFO. However, each time it's a horrendous experience.

Vehicles are bottom tier. Cab driver will always insist on just being like "What's the cross street?" (Bro use the satnav). Way more expensive.

Wasn’t flywheel a response to Uber?

I believe it was. Had a bit of controversy at the start with the guy fighting some taxi companies over it, but overall it does the job fine. The problem is that the taxis themselves suck.