Something new will have to come along to break Uber at this point. Driverless cars or regulation or something.
For Uber and Lyft, driverless cars have always been the end game. It just hasn't come around as fast as they thought it originally would. Taking humans out the picture will make them more profitable, even with owning the cars in-house being a thing. They will just buy enough insurance to cover damages.
I've done over 1,500 rides on Uber as a driver, back 8-9 years ago when it was new. I needed to make some extra money at that time, and I was able to do so. Used a 2007 Kia Rondo 5 passenger to drive with. The driver rates were much better back in the day, one of the reasons I never went back for more driving, my final big event was SXSW 2016. Used to be there were lots of guarantees that weren't that hard to achieve and it wasn't that hard to make $25-$30 an hour doing it. And the fees were only about 20%. Those guarantees have fallen off now due to the companies wanting to make profits, as noted in the thread title, and the Uber fees are higher from what I understand.
Nowadays, we don't use Uber that much in the US, but when we are in Brazil, it is our primary mode of transportation. It's much cheaper down there and rental cars are expensive, plus hard to park at times as we are usually in Sao Paulo.
Just got back from 10 days in Brazil and this time we rented a car because my parents were with us and there is no Uber XL in Brazil, so transporting 5 people in a single Uber is not an option. I ended up driving most of the time and it's a pain in the rear, MUCH more chaotic than driving in the US. I much preferred using Uber to driving ourselves. The only good part about it is that I liked our rental car, a Chevrolet Spin.