Then again, the vote to change the rules to disallow filibusters could itself be filibustered.
But, the Senate, despite all that, could (on motion) declare the filibuster unconstitutional, and only require a simple majority vote to affirm it.
Man, our Congress is so broken.
Source: 2nd paragraph of https://en.wikipedia.org/wiki/Filibuster_in_the_United_State...