I greatly enjoy this discussion, when it can be had civilly haha. It's absolutely fascinating to me the difference in theories.
Isn't the point of the cycle that these discs are constantly changing/evolving? How does one truly get to know a disc when it's, by design, slowly getting more beat in and the flight is changing?
My argument, for my bag setup, is that I don't play enough and/or abuse my mids enough to really get a cycle going in reasonable time. I don't want to go try to find a bunch of previously loved discs that are just so, to fill my slots. I have my two main core premium plastic mids that honestly cover all my mid work. I'm also not much of a mid thrower, being more likely to mash a putter or throw a slow fairway.
I can certainly see both sides. To each their own!
Yup, cycling does require more playing, so definitely a consideration between the approaches. I do throw Rocs a lot, so it is naturally easier to cycle them, rather than a more of a forced cycle.
When cycling, you are throwing the discs through their whole life cycle so at any given point, you know where they are at. The change in flight is gradual, not sudden, so you have time to keep them in their slots and you can see it coming when they change enough to move on in the cycle. So for example the Roc in my #2 slot will eventually change to fly like what I want in my #3 slot. Since I am throwing it when it makes that change, I know the exact time to put it in the #3 slot. If my #3 Roc hasn't worn in to the #4 slot, then I now have a backup that I know for sure fits in the #3 slot when needed. Contrast this with a disc I get off the shelf. Until I have thrown it, I don't know for sure that it will fit the slot I got it for. Even then, until I have thrown it in various conditions during a round, I don't know how it will be affected by things like wind. With the cycled disc, I have already seen how it performs in different situations, so I already know from experience what it is like.
But yes, it does require time to develop the cycle, and more playing and getting to know the discs. There are 5 fairway driver molds in my bag that make up 2 functional "cycles" so I do have a mix of the approaches in my bag. Fresh Teebird, seasoned Teebird, beat Teebird, Leopard3 is one "cycle" with 2 molds, while Flat Top Firebird, Firebird, Thunderbird, Thunderbird, Roadrunner is another "cycle" with 3 molds. Kind of a hybrid approach with drivers.