If they move to eliminate it, that means they are 100% confident they will never be in the minority again.
Ask yourself why they would think that.
Dem-o-graphics trending to a strong Heartland GOP with those on the fringes on the fringes, e.g., the Democratic Nationalist Cosalists Party. The numbers are trending GOPt.
Nope.
The Republicans worry about future consequences. That is why the Republicans refused to abolish the judicial filibuster during Bush's second term, when a democrat minority in the Senate was blocking Bush's judicial nominees, and why the Republicans refused to abolish the filibuster last year to pass a budget. In both cases, it was stupid to assume that if the Republicans did not nuke the filibuster then the democrats would honor it the next time the democrats were in power.
The democrats have never cared about future consequences and do whatever gives them the most power at any point in time. That is why Harry Reid unilaterally nuked the judicial filibuster to push through Obama's last few judicial nominees and why they will nuke the filibuster entirely the next time that they control the Senate, if it suits their purposes at the time. They are even talking about enacting a court packing scheme if President Trump gets to replace Ruth Buzzy Ginsburg.
It used to be that a two-thirds vote was needed for cloture...and it dates to before the Civil War. It was designed so that pro-slavery senators could block anything that might be a potential threat to slavery.