In the UK, none of the original companies that built the railroads still exist. Many of the railway companies were never particularly profitable and the railway boom was a stock market bubble. Lots of them were fraudulent or poorly run. Eventually they all either went out of business, or amalgamated and ultimately got nationalised.
Nevertheless, they proved the railway as a viable technology and built infrastructure that still exists and is used today (Ship of Theseus caveat). Were they successful as profit making businesses? Ultimately no. However society benefited greatly in the long run from their existence, even though we've all forgotten their names.
I can't see Uber as a company surviving the next few decades, but without them the taxi experience would likely still be as horrific as it was in the 90s.