I think for most +R "only" exists only in the mind
To take one scenario, dogs or other things being more highly prized than you and what to do about it.
First, you really need to know your dog and what it is ready for, next is managing that. You have to keep them from self rewarding on something that is higher value than you at that moment. I always use a drag line I can step on.
Not completely +R because if they try and leave, they do hit the end of the leash. It's more teaching them that they can't just check out and go do what they want and when they get frustrated, they come back and find great stuff still comes from me. That happens very infrequently because I don't put my dogs in that position.
You always have to be mindful of what is going on around you and how competing the distractions are. If you build it right, you don't have a dog that just checks out and goes for whatever it wants, but in the real world with real people and real dogs, you don't always get it "right" and there will be times you're in a situation that will call for something else.
Usually just by limiting what a dog can do during "learning" and building up to more and more competing distractions in a controlled environment, you can eliminate so much of what others struggle with all the time in training.
Chewing on things? that's a management thing. puppies chew, give them appropriate things, remove other things and limit their options.
I don't know how you'd control play biting, that's not something I think is worth even trying to think thru how I'd simulate that and transfer it to dog/dog interactions. I can certainly stop play at any point by giving them another command i've taught thru +R interactions and then let them resume when they've calmed a bit. But I don't think that's what you're asking.
+R only usually means +R "mostly" in the real world