It's important to remember that many buyers are trying to coordinate their EV purchases with other situations. In my case, I reserved both a Rivian and a Lucid, thinking that, based on their claims at the time of production start, at least one of them would become available by the time the extended warranty on my Tesla ran out. Then I would trade the Tesla for whichever EV made it to market and drop the reservation for the EV that didn't make it to market on time.
It turned out both Rivian and Lucid kept moving their production dates out, and I wound up trading our 2015 Tesla for a Tesla Plaid that came out just in the nick of time. (We actually ordered the Model S Long Range initially, but Tesla moved that date out more than six months beyond our warranty expiration. When we found we could close the gap by getting a Plaid, we switched our order.)
A friend wanted to replace his ICE car coming off lease with an EV. He negotiated a lease extension when he got a tentative production date from Ford for a Mach-E. Then the Mach-E delivery got pushed out, so he gave up and rolled over into another ICE lease.
Some people can live with a "you'll get your car when you get it" communications strategy from a manufacturer. A lot of people can't.