How many car buyers remember
How many car buyers remember to ask about a spare tire ?
Either because it is a long way down the list of purchasing factors....
....or more likely, assume a spare is there.
I know folks - not frequent car replacers - who have never known "no spare tire" - so it wouldn't occur to ask.
IMO, it should be made compulsory for Salesmen to tell buyers about spare or no spare.
Then an informed decision can be made....
...and car-makers get the feedback.