It's was part of the very same tax package and implemented for the same reason: It made the trump tax cuts look economically more reasonable by sticking in time delayed increases on tax burdens that would land on disproportionately on democrats. Yet democrats were unable to undo it because dem platform programs need the funding.

On what basis will it be different here? Dems are almost completely disengaged on the bill intended to fix this, almost all the activity for and against appears to be republicans.

Addicted's confident statement "Even when this fix is passed, it will be voted for unanimously by Democrats" seems misplaced and unlikely. If that were likely we would have seen broad dems support on fixing the SALT tax limits and we just didn't.