I read recently where the widths of the railway lines in Europe and USA were governed by the Romans. Apparently the Romans made their Chariots two horse widths wide, or 4 Feet, 8.5 feet. While they were running around Europe and the UK they created wheel ruts.
The wagon makers made their wheel width the same so as not to break the wheels, so when it came time for railroad rolling stock, they used the same mindset or tooling.
To be successful in todays business we must be able to adapt quick in response to the consumers needs, without the wheel ruts affecting our thinking.