I've experienced this too. On a year 2000 Toyota with a couple hundred thousand miles on it, battery removal literally makes the car not know how to move for 10

I've experienced this too. On a year 2000 Toyota with a couple hundred thousand miles on it, battery removal literally makes the car not know how to move for 10-15 minutes. The manual says that the car adapts to "driving style" and engine age/performance; it apparently gets to relearn all of that in a hurry after a reset. TL;DR: The car wakes up with amnesia and has to discover for itself that it's old.