This is all super interesting. In our family we’ve gone full lock down for my parents (in their 60’s with other high risk factors) and grandparents (in their 90’s). As in, they don’t leave the house (except for exercise), nobody else is allowed in their house. Young family members go to the store for them, get prescriptions, etc. My sister is a single mom and works at a grocery store, and my parents had been in charge of her daughter during working hours. The family has taken turns watching her so to keep my parents further separated from risk.
Meanwhile, the rest of us have kept working, from home where possible, but it does include some being out and about. We take precautions with hand washing, 6’ interpersonal distancing, etc. It seems like there can be an acceptable balance beyond broad spectrum locking down and business as usual.