LOL stop. MA had county governments and couldn't even deal with that and basically disbanded them.

Maybe if there's a concern about economies of scale, some reasonable reduction in wealth inequality, etc - it's about functional counties, not conjoining them all into one corrupt city government.

Take a look at how MD works. Absent Baltimore City (and a little bit of a hybrid in Annapolis) it's all about the counties down there.

There's no reason Wayland, Lincoln, Sudbury, Watertown, Newton, Waltham, etc all need their own 911 dispatch center, maintenance center, etc. And there's certainly no reason that the schools couldn't be funded in county to ensure that the wealth in Weston, Wayland, Newton, etc couldn't be used to increase school funding in Watertown and Waltham.

Middlesex Cty is probably too big and would need to be split into north and south.

All that said, yes - the current form of gov in MA is broken, and exacerbates wealth inequality. Annexing towns into cities is silly and will never happen. Moving emergency services, public services, and schools into a county structure would make sense.