Uber's recent investor day presentation (link here) is interesting if you're an investor or thinking about becoming an investor, but it's also interesting from an urbanism standpoint. Part of the promise of Uber was that it was going to help lure people away from owning cars. Looking at the data though (see below), ridesharing penetration is still pretty low in even Uber's largest markets: 3.9% for the US and 3.3% for Canada. Brazil is a leader here, which you might think is because of a lower cost per mile, but Australia isn't far behind.

At the end of the day, the vast majority of mobility trips are still being done through personal vehicles. This is certainly the case in the US with 6.6 billion weekly trips in personal vehicles versus 191 million on public transit and 22.6 million with UberX (all 2019 data). And for those taking Ubers, about 90% of riders are using some form of UberX -- that being a solo, on-demand, point-to-point trip with a 4-door car. So sharing a car with strangers and using different/multiple modes of transport hasn't really caught on here.