XIAO interrupt support on pin 5 and pin 7 (the two pins cannot be used at the same time)

on this page seeedstudio.com Seeeduino-XIAO is stated that:

All pins on Seeeduino XIAO support interrupts, but two pins cannot be used at the same time: 5 pin and 7 pin. For more detail about Interrupt please check [here] (links to some github code).

I am not sure if I understand this right, and if I need to be concerned about this limitation.

Could somebody please explain how that would limit me?

I kind-of know what an interrupt is, but never used one. I think…