Even with Uber never getting a real foothold in Germany, they still did just that. It start with the myTaxi (nor for some inexplicable reason rebranded to FREE NOW) app that allowed you to book a cab, see where it is, get a price estimate and pay with your credit card. It wasn’t as smooth, but still better than before.
Now last weekend when I came back from a party at night, I called out "Anyone taking card payments?" and two drivers out of 10 raised their hands, they used SumUp [0] which is also what my favorite cocktail bar uses :)
[0]: https://sumup.com/
Black cab drivers also got into Halo and other apps for ride hailing, and there are now a few other third party private hire apps for non-Uber drivers. I also think it made Addison Lee - the largest private hire company in London pre-Uber - shake their game up a little.
A few people will complain, but genuinely, London will be a better place without the fleet of thousands of Toyota Priuses circling all day, every day being driven by people who TfL suspect are not fit to hold a private hire vehicle license.