Personally for me, I would have taken the Plaid if the normal steering wheel existed. I may decide to just get a slightly Used Model S 2020 in the interim and bide a year or two while Lucid fixes some of the teething issues.
Our Plaid is our second Tesla (replaced a 2015 S P90D), I bought my brother a Model 3, and I have a bucket of Tesla stock -- so I have no interest in trashing Tesla. There are some things I like about the Plaid over the Air, but more things I like about the Air over the Plaid.
Tesla's software at this point is considerably more evolved than Lucid's in most respects. There are some things Lucid's can do that Tesla's cannot, such as simulate a bird's-eye view (due not to software limitations but camera placements on the Plaid). But Lucid's software is improving at a fairly good clip. I am also a skeptic about Musk's claims that he will get to Level 3 or 4 ADAS with optical cameras alone, and I appreciate that Lucid has a more comprehensive sensor hardware suite to go down any path that future software developments bring.
I also love the Google satellite maps that display on the Plaid's huge screen and sorely miss it in the Air. (I do a lot of exploring with our cars and love being able to see what's behind tree lines, over hills, and around corners that I might want to explore further.)
It sounds like a nit, but I visit the front center console pretty often while driving, and the Plaid's is considerably better thought out and executed than the Air's. And I remain mystified that the Air only provides one wireless phone charger (in which some phones do not even fit) where the Plaid provides four which require nothing more than just laying the phone down instead of trying to squeeze it into a slot.
Finally, there's the acceleration. The Air Dream Performance is blazingly, blazingly quick. But the Plaid seems actually to have repealed the physical laws of inertia. It's a complete freak show if you're into that kind of thing. (The price you pay, however, is a front end that becomes dangerously more unplanted than the Air's during hard acceleration.)
Now, what's better about the Air . . . ?
Passenger space and comfort. The Plaid cannot accommodate four adults in good comfort for any real distance. The rear seat, though much improved with the 2021 updates, is just too cramped. Rear seat passengers in the Air actually gush about the roominess for a car that size, and we have ceased to drive the Plaid with more than two people in the car. And after sitting in the Air's front seats with the adjustable thigh supports, the Plaid's front seats seem suddenly primitive and undersized.
The Air is quieter, the ride more compliant, the body structure more solid, and the handling a marvel for a car of that weight on relatively narrow tires (even with the 21" wheels). The Plaid's handling is hampered somewhat by that ridiculous yoke (and its even more ridiculous haptic buttons), but the issue is more fundamental than that. Lucid just plain trumps Tesla in suspension engineering and in the structural rigidity that enables the coupling of great ride compliance with extreme handling precision. (No surprise, since Peter Rawlinson was Chief Engineer at two of the most-storied suspension houses in the industry: Jaguar and Lotus.)
Lucid is also much more clear-eyed about user ergonomics with things such as A/C controls and vent positioning, audio volume control, and wiper and exterior light adjustments.
Finally -- and this still baffles me -- after ten years of building huge numbers of cars, Tesla delivered a Plaid to us with more initial quality problems than did Lucid with our production car #154. We've had some issues with the Air that required multiple (but relatively painless) service interventions, but the Plaid has had more problems, and its sketchy service experience has left us living with a few of them rather than bothering with trying to get Tesla to correct them.
The next automotive question in our household is what EV can replace our trusty Honda Odyssey? Will it be the Launch Edition Rivian R1S we have had on order for three years or the Lucid Gravity SUV? One thing it will not be is a Tesla Model X which, even with the new updates as a people hauler, still has no storage pockets, no center armrest, and no cupholders in the second row. Say what???