Judge Sullivan has semi-retired taken 'senior status' and remains active as a federal judge. He also chairs committees that contribute to recommendations for presidential appointments to courts in DC.
Q 4770 hinted that public info would come out that would result in Sullivan stepping down by March 2021. That info would be about possible co-operation between Sullivan and the Mueller operation.
Today is 11 Feb 2021. Only 17 days left in February this year.
Pic related.