A decade ago Uber seemed poised to be the big tech powerhouse. Maybe not a platform per se (certainly not an ecosystem as other companies had it) but a major provider of software for all kinds of verticals beyond their core business. What happened to that?

Uber managed to make the business by lobbying so hard. In some countries they broke the regulation of tax drivers and made the environment like wild jungle. Now, people don't feel "safe" anymore for random Taxis and prefer Uber in many places.

Most of Uber's "platform" seemed like pet projects that engineers used to justify promotions, and then were quietly abandoned.

Many of them left and turned into startups around that tech, like Temporal.