It’s business hardware so the support term is predictable and known at the time you buy the device. In the case of Cisco it’s 5 years from when the device is discontinued.

But then small businesses like to cheap out and gamble on a device that has a short time of support left and complain when it ends.

This is not a surprise, except if you chose to put on a blindfold yourself. And if you think EOL of 5 years is too short, don’t buy a device with an advertised EOL of 5 years.