I reserved a Rivian R1S on February 15, 2019. The vehicle was going to be delivered in late 2020. Then Spring 2021. Then Fall 2021. Then I got an email telling me my "Rivian Guide" would contact me no later than Thanksgiving 2021 to discuss final order configuration. Then I got an email saying my R1S would be delivered in May/June 2022. Then Rivian hit me with a $18K price increase. Then they backed off in the face of mass cancellations. Still no contact from my "Rivian Guide". Still no answers to the two emails I sent them months ago. Still no idea when -- if ever -- I'll get this vehicle.
Yeah, Lucid frustrated me with repeated production delays. It didn't help that switching my color choice occasioned a delay that Lucid assured me would not occur. But, end of the day, dealing with Lucid has been a cakewalk compared to the constant delays and total radio silence from Rivian for the past three years.
Take a look at the Tesla forums to see what's been happening with people trying to get their hands on a Model S Plaid. No cars for test drives. Long delays. Virtual blackmail to try to force the purchase of FSD (which has bumped up to $12,000). Etc.
Mercedes EQS? Better be willing to pay tens of thousands above MSRP for a lumpish car with no rear headroom, no frunk, and an interior from the video arcade in a casino.