In the long ago, I'd generally throw only 4 or 5 discs in a round (didn't carry much more than that). A putter, an approach, and three drivers--US, stable, OS. Lots of rounds where only three of those came out of the bag.
Now, we have fairway drivers and control drivers and distance drivers--oh, my! If one chooses to slot by distance, then simply adding three driver slots in each class adds six discs to the mix. If one wishes to diversify mids, then another couple.
I won't say there's greater purity or somesuch with fewer discs, nor will I say there's greater capability in shot selection with more discs. I think it's a major change to go from one norm to the other, so those who have always played with multiple driver classes will find it interesting to work with fewer and those who started in the long ago will find it a major change to throw with more.
Currently, I'm in the process of adding discs into the lineup to see how it works out. I figure to top out around 13-14 discs. Then see how many I actually get in the habit of using over time. Spent so many years with half a dozen that it feels weird to look in my bag and see so many discs.
