For someone who doesn’t drive and is married to a lab worker there’s really nothing better in North America then Cambridge.

Transit is not to the level of New York but it is reliable enough if you live near a T line. Busses are being worked on but only the busiest lines are reliable.

Walkability is very high within the Boston-Cambridge-Somerville area. I’ve lived here with no car for 6 years and although it makes mobility out of the city hard, within the city it’s never truly been an issue. Cambridge itself is considered the most walkable city in the US, and living here you can see why. The layout first built in the 1600s is still here.

Not to mention basically every new development here is a life-sciences lab, so work should be easy for your husband if he’s in biology/pharmaceuticals.

(Sorry for posting the same comment 4 times, Reddit glitched)