Right, the distinction I'm making is this isn't just "normalized" but actually the correct spelling. As in, if a newspaper editor saw it written as "drive-through" they would be obliged to correct it.
A drive-through or drive-thru (a sensational spelling of the word through), is a type of take-out service provided by a business that allows customers to purchase products without leaving their cars.
Sensational spelling is the deliberate spelling of a word in a non-standard way for special effect.
"Drive-thru" is purposely spelled wrong to attract attention. The same as "Krispy Kreme" or "Dunkin' Donuts." It's only "correct" in that it has become ubiquitous through usage.
It's only "correct" in that it has become ubiquitous through usage.
What you are describing is called "language"
"You" wasn't always allowed to be singular. Colour vs color. Doughnut can be donut. Etc. Languages evolve over time, and "drive-thru" is in plenty of dictionaries.
Not necessarily. Some hole in the wall serving the best damn breakfast pastries our country has to offer is gonna call it a donut. A donut is a working class doughnut.
Dictionaries are descriptive, not prescriptive. They don't decide if something is "acceptable", just if it is widely used enough to report. If a mistake becomes common, it will enter the dictionary.