The answer to this question is a bit tricky but I can answer it from my personal experience in addition to what I've gathered from here:
For reference I took delivery of my DE on Jun 26th (in the first handful of them that were delivered). When I first got the car, the biggest issue I had was a connectivity issue requiring me to reboot or switch profiles back and forth EVERY TIME I got in the car which was fixed after the first software update that happened about a week or two after I took delivery.
I *knock on wood* have not been plagued by key issues like others on here....though I may be using my keyfob in a simpler, more consistent way (based on my preference of how I like to use the key) which may be contributing to my luck on that. I have had 2 brief, self resolving instances of "keyfob not detected" and I haven't had any of those in the last 3 months or so. So, those two things have moved in the correct direction along with a marked reduction in erroneous "wireless charging unavailable/headlight error" messages that I used to see with occasional frequency when I first got the car. Those messages along with the occasional random airbag light seem to have been essentially fixed. Nothing truly mechanical or catastrophic that prevented me from getting from point A to B on my drive. As far as I know, the only "mechanical" issue my car has is the 2nd row squeak which I had for 1 day until I moved the seat into a position that prevents it. I haven't had it since but I'm sure I can move the seats around to get it to return--I've opted to not have it fixed yet until Lucid pinpoints it and has a simple fix (currently, the service guy said he'd be instructed to replace the entire rear seat unit--likely with another one having the same issue).
That being said, the most recent 2 updates in an attempt to fix the keyfob issues and erroneous error messages seems to have introduced the black screen issue which is certainly an annoyance that can delay my departure out of the parking space... The latest update seems to have decreased the frequency of this to about 1/10 car starts and lasts about 15-20 seconds. I also occasionally have the disappearing graphic that displays the artist/song/SXM station next to the speedometer that others have reported. This did not happen when I first got the car. I also continue to have the issue where the ambient lighting color seems to revert to white (though this happens less often now than when I first got it).
So, overall, I'd say the software updates follow the mantra of "two steps forward, one step back". I do have faith that things will continue to get better over time.
As for how many people are having issues... that's very hard to say as the sample size here seems to be pretty small compared to the number of deliveries reported by Lucid. I do suspect that things like the erroneous error messages and black screens are probably happening in most (if not all) vehicles if it's an issue inherent to the software. The keyfob issue is a little bit more questionable as to how widespread it is. I suspect it's fairly widespread given the public acknowledgment and "rush" to fix it...but that may be due to some hardware issues that may only plague some of the vehicles. There's definitely a wide range of keyfob problems/successes here on this forum.
Some of the other issues that people seem to have such as window issues, GPS problems, camera malfunctions I think seem to be even less widespread and specific to back luck with certain vehicles.
At the end of the day, the issues I have are pretty minor software gremlins and I do not regret the purchase of the car at all! Hopefully my luck with the car is the majority situation with most deliveries rather than the handful of horror stories you'll see on this thread. My condolences to hmp10--I think he needs to stay inside during any lighting storms given his luck!
