Unironically yes. This is how long term marketing works.

Subway was founded in 1965.

The "$5 Footlong" was introduced in 2008.

The cost of a footlong tripled in 16 years.

You would think a business that has been in operation for 43 years at the time would understand that prices change over time, and creating a slogan that locks a single era's price into people's collective consciousness would be a bad idea long-term.