Putting on my "ponderin" hat.
I think most disc golfers have a few stages they go through on the disc acquisition front, if they get bit by the DG bug.
You start off getting a base plastic Innova starter set, because they are ubiquitous and fairly cheap. After not too much time you either lose them and/or they are too understable for your arm. Maybe you get a different starter set, this time in Champ plastic, and that one is too overstable. Finally you realize, by talking to someone who knows, or watching a video, or figuring it out, that you can buy individual discs!
You start dabbling in buying a few discs. Some of them you really like, some you don't. Now you are in trouble because you start trying disc after disc, trying to figure out what the heck flight numbers really even mean. Slowly you start building a bag. Somewhere in here you get a full size disc golf bag and have the insatiable urge to fill it. You increase your pace of buying discs.
Then you realize that there are "cool" discs. You see a cool stamp, you learn about disc dying, you get an add for a Discmania mystery box, or, horror of horrors, Dynamic Discs pitches you this disc golf subscription service called "Handeye". Now you are acquiring discs for looks, maybe even sight unseen.
Now, somewhere in there, through all the swing changes and increases in power, you start realizing you are depending on some favorite discs. You start to have a stable bag.
And then one day it happens, you lose one of your go to discs. And not only that, when you go to buy another one, you discover you can't get it, for one of various reasons. You are horrified. (This is very especially the case if you are newish and lost one of "those" discs in the last 2 years.)
Now you start looking at your bag a different. You wonder, which of these discs are actually replaceable on short notice? It doesn't matter that you already have similar discs that do similar things, they aren't that mold you gravitated to and love. Or they aren't in the plastic you want.
For me it was a combination of a) losing my favorite fairway driver, a Stag in Tournament (gold line) plastic and realizing I couldn't replace it. It's a stock disc, but there are no plans to manufacture it in that plastic again, at least for now, b) realizing that, while a Pig is supposedly extremely similar to a Zone, I just don't get on with it nearly as well, and c) falling in love with the Streamline Pilot in Cosmic Neuton plastic I got from the PDGA last year. So I bought 3 more even though I don't see needing a new one any time soon. Also got one in Proton and Electron to play around with mold minimization.
Is that a lifetime supply? Who knows. It should certainly last me quite a while.