If you look at the list of Cardinal Electors, you'll notice that there are exactly 15 of them who are over 79 (and will be 80 in less than a year), 15 being the EXACT number they're over the 120. So Bergoglio was probably hoping they'd be gone in a year, but he didn't make it that long.

And they may end up saving the day, assuming one accepts the legitimacy of the conclave in the first place. They might be able to block a two-thirds majority that would otherwise elect Parolin, Tagle, Hollerich, or someone equally objectionable.