They had to slow down the robots so they didn’t outpace the database. Slapping an SSD in a database increases write speed by 4X. They probably could have increased battery production by 15% for a total of $99. Slow database meant slow robot meant slow battery pack production meant slow car production. Replacing a working thing might be bad, but when your expert says your thing can be drastically improved with a trivial upgrade, you should do it. Especially if it’s in the critical path of production. You can’t know everything, but you can employ experts. But they can’t help you if they’re not empowered.