I think work from home has changed this a lot. My GF and I both work from home indefinitely now so really no need for two vehicles anymore without us both commuting.Back in the day when one parent could support a whole family (1970s), yes. Nowadays,no way.
Work from home has improved our quality of life leaps and bounds. Not to mention saving us a ton of money! We save ~$1500-1700+ a month not commuting. No more pre and post school care for the kiddo, gas for commuting, sold a vehicle so one vehicle to insure, wasting all the time on the road, not having to call into work if my kid is sick etc. I never want to work in an office again. I'd honestly take less pay to be able to work from home.