Tesla Roadsters have been on the road for over a decade. I have a 2012 Model S and a 2018 Model 3. Best cars I've ever owned, and my almost seven year old S keeps getting better with software updates. I totally get people hating on Elon, but it must largely be jealousy of what he has accomplished.
Well yes. Most people's current car is the "best they've ever owned" because people generally amass more wealth and drive nicer cars as time goes on (people who begrudgingly buy minivans notwithstanding).
I'm not gonna declare Tesla a "mature automaker" I see scrappers strapping stolen I-beams to the roof of 20yo Teslas.
SpaceX is the more mature and financially stable company by far IMO.