I don't know that that is true (but I don't know that it isn't, either).made the change from 3 switches to 1.
just out of curiosity, why are JK flip flops good or the more common of flip flops to use? i know i could have implemented a counter from any other flip flop, but i hear professors mention that JKs are the more commonly used ones.
As you say, you can use any FF type you want. I think the DFF is the most straightfoward to use, at least from a conceptual and logic design point of view. But it can probably be argued that the JKFF is more likely to let you implement your excitation logic with fewer logic gates.