Tesla had over 500k Model 3 reservations by the time they started production and lost roughly 33%. At the rate the C is going they will be close to that number of reservations I bet.Tesla is up to 250,000 now.
But those are funny numbers and not directly comparable to Rivian's. Tesla requires only a $100 deposit vs Rivian's $1000. That makes a big difference. Lots of folks will put down $100 just for the heck of it. Calculations saying Tesla's orders represent $14 billion are also bogus: I expect only a fairly small fraction of those preorders will end up as actual sales.