I think the people who find it difficult to go on and off and change their training accordingly have an addictive personality. I do. But I think the character of the individual is called into question when they can't get past that addictive personality. I quit cycling, alcohol, smoking, drugs, and all it took for me was deciding to just stop and making my mind up not do whatever I wanted to quit. No excuses.
Sure it's more fun to keep adding weight to the bar on AS but that goes away after a while. That while may be 3 months or 3 years, but it does go away. It's like building a sand castle. At some point you want to start over and build it again, maybe a different way. I have come off for as long as 4 years at a time and then started over.
At this point I am 40 pounds lighter than I was at my peak weight but that doesn't stop me from enjoying my training and cycling. I don't come off anymore but I go up and back down on my doses. So for me going up is a cycle. I think after many years you'll end up the same way.