Tesla doesn’t have 500K cars. I believe they have sold close to 150k cars till date. But your point remains valid. That is a lot of data compared to 27 cars
I had VIN #150,000 18 months ago, and they crossed 200,000 in May 2017 so it’s likely sitting at just shy of 300,000 right now. The 150k figure you are citing is US only (where there is a race to 200k when the federal credit expires).