My guess is that the Dems are hoping and praying that she can at least make it another year to get within a year of the Presidential election and throw that in the face of McConnel and the Republicans (ala Merrit Garland). At 85 with serious health issues, that may be a bridge too far.
Has there ever been a President who got to nominate three Supreme Court Justices in his first term? That seems pretty amazing to me, a third of the court.
There’s almost no chance in hell she’s making it to the end of the year.