Posting just in case anyone is still wondering on the waitlist movement:
I had a call with admissions last Friday inviting me to be a standby alternate for the class of 2024.
Stan said that the class is full and there has been very little waitlist movement, and they don't expect more movement before class starts.
They usually have 2 standby alternates, but they said there will be 4 alternates this year due to the pandemic.