Uber has issues but honestly it's night and day compared to what taxis were like. And they decrease DUI's.
Do you believe Rebu could that have managed to draw the same level of venture-capitalist money and unicorn-ness and hype, even sharing the same core technologies, code, and product features?
I don't think it would, and I'm asserting that comes from business-plans, labor relations, legal challenges, government lobbying, investor marketing, etc., which in several cases have been, er, ethically-problematic.
So why would they bother to adopt "Rebu"? It's nothing but downsides: their taxi drivers have to work harder, have to be more polite and drive more safely, have to have cleaner cars, and have to be more accountable in general. Not to mention of course Rebu is going to take a cut of all rides booked on their platform.
There was no way to make regular taxi service better without structural and legal reform that the incumbents did not want. The only way to fix it was to go outside the system and do something sketchy. And it worked! For all their issues and controversies, the ride-hailing app experience is amazing, especially when compared to old-school taxi service. Some legacy taxi services have stepped up and improved a bunch since then, and others have just faded into obscurity.
But overall this was pretty bad investment for humanity. Let's just stipulate it's a lot easier to get a ride at a reasonable price and that's a good thing (not a given considering increased traffic and greenhouse gas emissions, plus decreased pressure for cities to move away from car-dependency). Was it worth multiple billions of dollars and software engineering hours? Like, assuredly not. It's a big "LOL" drawn in lipstick on a portrait of the efficient market hypothesis. It turns out the private sector is also great at just setting huge piles of cash on fire.
It's an indictment of the VC model where essentially you build a company that hogs all the value for investors. If you think this is a good model, i.e. that investors make better decisions than governments, labor, and the market, then I think you have to reckon with the utter wastefulness that is Uber. A better thing here would have been to just build a ride hailing app for existing cab companies.