This is very true. It probably wouldn't be passed tomorrow if given a chance. However, sentiment on this is swinging very rapidly. It was a fringe idea in 2016,

This is very true. It probably wouldn't be passed tomorrow if given a chance. However, sentiment on this is swinging very rapidly. It was a fringe idea in 2016, and in 2020 it was a central pillar of many (if not a majority) of the Democratic candidates in 2020. Because people campaigned for it, made the case for it, and built coalitions on their side. Politics is a marathon not a sprint. It may not happen in 2020, but it's certainly closer to reality than it has ever been.