This is not the stated goal of many, many, density/zoning/transit advocates. Bills have been introduced, stillborn, in Oregon, Washington, and California to ban single-family homes in certain areas by "forward thinkers".
I admit that some diehards want to band them outright but I think the majority just want zoning to be looser so NINBYs can’t veto any extra density.
I mean, I live in a city with well over 25,000 residents and am currently watching a single-family development being built along my commute.
>Towns and cities with over 10,000 residents were required to allow duplexes on land zoned for single-family homes by June 2021.
>Towns and cities with over 25,000 residents were required to allow up to four-unit buildings as well as cottage clusters—four or more detached units with a shared courtyard—in residential zones by June 2022.
https://bipartisanpolicy.org/blog/eliminating-single-family-...