Ride-hailing takes an incredible toll on cars, and with Uber pushing more costs into drivers that might otherwise be borne by the taxi company, there was no way the original standards of cleanliness would last forever. It all regresses eventually to “minimum amount of maintenance that people will still accept” and so Uber and taxis will be basically indistinguishable given a few more years. Hired cars are a commodity, after all, and this is what always happens to commodities.