Okay, rewording to comply better with forum guidelines (and replying to my old post because editing is no longer available):
The most recent update added shuffle but the playlists are still limited to fewer than 500 songs and Alexa will not play music from the USB. Hopefully a future OTA update will allow for all USB songs on one playlist and an additional option to have Alexa (or some voice command) to play a specific song from the USB and then continue shuffling from the same USB. This is certainly something that should be standard on a luxury car, and although it's not going to really be a deal breaker if choosing between a Lucid and another EV, it is certainly annoying to those who purchased the Lucid already.