With Uber rides this cheap and self-driving cars around the corner, I doubt that future generations will have their own cars. Except for extreme use cases, like commuting from the countryside.
Personally I spent EUR 91 on Uber this year (2 months) and it got mit 260 km. That's 0.31 EUR/km.
There is an API to download your rides, but getting receipts/prices didn't work for me, so I had to scrape them from the website directly. Hope Uber allows getting prices from their API at some point.
This is the code I used. The Uber-logins aren't automated yet.