Agatha Christie's quote is well-known but the exact same situation still holds today in many countries. Here in Viet Nam it is extremely common for middle income families to have a maid or nanny (or both) but not a car. The cars themselves are quite expensive. A Honda Civic is $33,000 by itself whereas a nanny (6-days a week, 10 hours a day) is $400-500/month and a maid who works 9 hours a week, i.e. 3 days a week, 3…
I'm in a moderately ok country, and I still see buying a new car as a luxury. It's something you do much later in life/career, when you can't be bother to take care of the extra management a used car comes with. And definitely not for everybody - there's quite a few people I know that are middle age with kids and don't even think about a new car. They just have chose other tradeoffs
Note that this is a very eurocentric viewpoint coming from someone who only has a car for shopping and family visits.
In my previous job I had a lease car from my employer, that made a bit more sense then given how much I had to drive.