Third Spaces are important for building local communities, but why must they be supermarkets? Time being zero-sum game, the challenge/opportunity isn't how to preserve artifacts of accidental discourse, but to create new fora that enhance the tapestry of social life.

Phrased another way, inefficient services sector processes are imposed upon us, and the preferable alternative is "opt-in" (e.g. farmers markets, bars, or what have you).

You might also find interesting the pro-feminist discourse around automating "traditional" roles. Preserving long supermarket lines exacerbate social inequities you may not be so fond of.