It never held all that much. The 'progressive' movement used to support eugenics as far late as the 1960s in some places. And economic freedom used to be seen as a conservative value exclusively prior to the 1980s and 1990s, but today it has contributed to lifting billions of people out of poverty, and many on the "neo-liberal" left support it. More recently, the left is also slowly moving towards supporting a preference for skilled over unskilled immigration to protect vulnerable and marginalized citizens' jobs and reduce concerns over social frictions, something that used to only be a talking point for conservatives.