There hasn’t been a Supreme Court retirement in more than eleven years, making this the longest serving Court since 1823.
Of 100 U.S. Senators, 56 have never even voted on a Supreme Court nominee.
Here’s a chart (posted at the website of Judicial Confirmation Network, information compiled by Progress for America) showing how the timing of the nomination and appointment process has unfolded in the last nine nominations to the high Court, beginning with President Ronald Reagan’s first appointment in 1981.