That's also true in many big cities (Singapore, New York). This article fails to consider this point of view that she really didn't need the car similarly to many people living in those places today.
The fact that she could afford a maid and nurse, maybe was because she was wealthier than majority of population. If she was in 1% of income bracket (that would be $421,926 per year in the US), then it is not unusual for those people to hire cleaners or baby sitters on regular basis even if they don't employ them full time.
Ah yes, I think I was agreeing with you than not everywhere is dependent on cars even today, and many of my London based friends neither own cars or have licenses.
I'm sure in her time if you lived outside the city a car would be higher up the list of desirables as it would have a material impact on your day to day life.
The article could probably do with a contrasting source comparable to Agatha's wealth but from the countryside (even the "home counties") as the spending patterns would be very different.
The fact that she could afford a maid and nurse, maybe was because she was wealthier than majority of population. If she was in 1% of income bracket (that would be $421,926 per year in the US), then it is not unusual for those people to hire cleaners or baby sitters on regular basis even if they don't employ them full time.