"Oh, you think this faulty part or counterintuitive feature needs improvement? It's open source... instead of complaining, why don't you just fix it yourself? :)"
I don't understand your comment.
Hence there will not be a FOSS car.
If you've never heard at least one variation of "stop complaining, it's FOSS, we're not paid, we're all volunteers, maybe try downloading the source and fixing it yourself" then you've not interacted with the FOSS community long enough. It's a very common trope unfortunately, so much so that's it's become a point of mockery by those outside of the community.
Again, I don't understand your comment.
Edit: That's not true, I actually do understand your comment. I just think you could use a more grounded outlook on the value of FOSS. But hey, everyone's got their own path.