In April 2017, in the wake of Pubs getting rid of the filibuster for SCOTUS justices--which they did in response to the Dems getting rid of the filibuster for circuit judges in 2013--a bipartisan group of 61 Senators sent a letter to their respective party leaders advocating for the retention of the filibuster more generally. The letter was signed by 32 Dems, including Chris Coons (D-DE), Joe Manchin (D-WV), Patrick Leahy (D-VT), Mark Warner (D-VA), Amy Klobuchar (D-MN), Bob Casey (D-PA), Dianne Feinstein (D-CA), Kirsten Gillibrand (D-NY), Cory Booker (D-NJ), Kamala Harris (D-CA), Tammy Duckworth (D-IL), and Bob Menendez (D-NJ).
Getting rid of the filibuster for circuit judges didn't work out so well for the Dems--yes, they got their 3 DC Circuit judges, but their antics resulted in them being unable to filibuster Gorsuch, Kavanaugh, and, worst of all, Barrett. Politics are cyclical, of course, but the Dems are now banking on being able to make structural changes to our government designed to keep themselves in power--statehood for DC/PR, 15 SCOTUS judges--and create massive bureaucratic and social changes that will act like a one-way ratchet that would take too much political capital to undo when the Pubs come back into power--like M4A, $15 minimum wage, etc.
For the past 4 years, the drumbeat from the Dems has been how the Pubs just wanted naked power. Whether true or not, turns out that accusation was a bit of a projection, and, in light of the Dems' about face from April 2017, a good reminder that there is no moral high ground in politics.