Of the roughly 2,000 protocols listed on the IANA's protocol page:
Requires IETF review: 604
Requires Expert review: 565
Requires specification: 570
Expert unassigned: 297
The earliest missing expert goes back to RFC1505.
How do you get an assignment where there are no experts assigned?
And how likely are these experts to get assigned when it already seems difficult
to get meeting scribes?