It also great to have your most used or primary channel in 1 or 16, as always can find by rotating to a stop. I know that this is why public safety likes using these radios.
That's the way we used to set them up. Primary talkgroup in #1, emergency talkgroup in channel 16. All the user had to do was twist the knob one way or the other till it stopped.
On my Kenwoods, since we don't use the emergency button, I have that set to jump to the emergency talkgroup. I program the "home" button for the primary.
But, yeah, the stopper is nice.
I did take them off all the NX-3000 series I have so all radios on the system operate identically. While some talk groups are different, the button/knob layout is the same. Makes it much easier for user training, and makes it much easier when someone has to grab something other than their own radio. Stopper would probably confuse my users, and they'd break the knob off since "that's the way mine works".