Places that have started to convert parts of the spread-out bullshit into 15 minute cities (which is how the process will occur, we have to deal with existing city design and cannot start fresh) see astonishing levels of gentrification in those parts.

The road to the 15 minute city might be littered with 15 minute districts but again I feel like there's an important distinction to be made here. The 15 minute district is just gentrification, as noted, already happening. The 15 minute city would be rather liberating.