Elon looking back on the X... I believe other comments at the time talked about the Falcon Wing doors as being much of it:
<scaesare quoting another posting - apologies, I cannot get the formatting correct>
"In retrospect, it would've been a better decision to do fewer things with the first version of Model X and roll out" new features more slowly over time, Musk told investors on a conference call. "I think there was some hubris there with the X."
Despite all that, Musk quickly added that all the Model X's features add up to "the best car ever" — an extremely ambitious vehicle that no other automaker would dare attempt.
"I'm not sure Tesla would make a car like this again," he joked.
So not sure they'd do that again on the compact model... or if they feel they've figured them out enough that they aren't a "new feature"... I suspect more traditional doors.
Setting aside discussion of the in-the-future compact model, it strikes me that the CyberTruck is, in many ways, Tesla doing the same thing they did with the Model X. Many, many new things all at once...arguably, even more so than the Model X. Rather than "not sure Tesla would make a car like this again", it seems they have. Much like with the Model X, I believe we can all agree that there was "some hubris there" with them making the CyberTruck. Also, much like with the Model X, I believe I will get myself one.