I thnk chewing just comes down to the individual dog (if we dont include traiing).
Some dogs are just going to always chew no matter how many outlets they get etc (our Lennox was a prime example of that, and some dogs just really enjoy it. Pippi is one of those, she alway shas something in her mouth (usually her "angry" toy as we cal it but sometimes stuff she isnt meant to have - that's why we had to get the "leave it" command good LOL)
Then Baney is a dog who wont chew anything except what hes allowed. He wouldnt even dream of chewing something of ours even if it was left outside all day. Chevy was the same