The problem with multi-family housing is that it’s ripe for abuse by building managers. Unless you own the entire building you live in and the entire plot of land it sits on, you don’t own anything, and your home can be taken from you at will without meaningful recourse.
I gather this isn’t an issue in Europe, where people have actual protections under the law, but as long as real estate in America remains the Wild West, living in single-family housing is and will remain an absolutely necessary act of self-defense.
Mixed zoning would be good, though. Being able to walk to at least a convenience store would be, well, convenient. If the prices there aren’t ludicrously high, anyway, which is a serious problem with convenience stores today.