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To me, “taking a break” specifically implies in the phrase itself that you mentally intend to go back to it at some point. 
Actually quitting for good means that there is no further intention and that you have sworn the substance off permanently for the rest of your life. 
It’s all a matter of the mindset. 
To me personally, there’s a huge difference between “taking a break” and actually quitting.
Edit: getting rid of where I typed “between” twice.
Sure, it is very hard to truly quit, and coming back to them is common, but If you go in with this mindset, relapsing will be a self fulfilling prophecy. 
If someone has made it a year without during one of those, they have earned the right to say they successfully quit even if it's not out of the realm of possibility they will end up doing it again. >

I was a pack a day smoker for about 20 years. Then I spent about five years trying to quit and consistently falling off the wagon now and then. 
Now, I just embrace the limited smoking. I’m down to about a pack a year. Not exaggerating. I keep a pack of smokes in my desk at work and I have one cigarette about once every two months. I never smoke if I’m less than two hours from seeing my kids. 
It works for me. Much better than, “I have to give this up forever!” Which invariably just stresses me out and causes more smoking. >

That seems like a very edge case. How do you get past the, “just one more won’t hurt” mentality that got you addicted in the first place.
Very impressive nonetheless. >

It’s really the difference between feeling like you need a cigarette and having one every once in a while. A lot of us got to the point where constantly smelling like smoke, burning our money and coughing was frustrating. 
A lot of people on the quit smoking subreddit that wouldn’t consider it a relapse to have one and enjoy it but say that one was enough or to have one and say meh it’s really not for me anymore. Once you get out of the habit it’s not as desirable second time round >

This isn't an unpopular opinion, it's a question. >

I don't think we quit addictions, we just become invested in a new addiction that's less detrimental to our well-being. >

I quit opioids years ago and haven’t gone near one since. >

Well done. I hope it stays that way.