“How do you do without _____?” (short & sweet)

I have a new answer. It is, simply, “The same way that people did without XYZ for hundreds of thousands of years.” (And the same way that billions of people around the world still do without XYZ today, albeit not necessarily by choice.)

It works for lots of things: car ownership; air conditioning; 401(k); washer dryer dishwasher etc.; leaf-blower; and many more.