I agree with what was said earlier, aside from a few outlier runs I think the differences aren't as drastic as what they're made out to be. Personally I typically have more than one pd in the bag at a time, so I actually prefer some minor variation to help distinguish why I carry them.
Years ago I'd carry a first run C line and it was pretty much used as a firebird. I also carried a seasoned s line that was the go to driver, and a P line that was more for hyzer flips and turnovers. After a couple of seasons the first run broke in enough where it got longer before it would fade, and in stronger headwinds would track a bit. At that point I put a firebird back in the bag, and reevaluated what discs I felt I've needed for which shots. Bagged third runs for a long time, seventh runs are also hidden gems in the C line pd world also. S lines have always been my personal favorite but they have their own variations also. G and P both (RIP) were great discs as well. I lost my go to seasoned S line about a year ago, didn't have one in similar condition in a backup box, and actually put a flat gummy C line cd2 in the bag to fill the gap. It's worked fairly well.
I think it boils down to the fact that all pd's are awesome, some do certain things better than others...won't argue that. Find the ones that fit into your game/bag and supplement the missing stuff around it. For me right now, the combo of firebird, pd, cd2, and roadrunner make up the high majority of my drives. Depending on the course I might add an extra disc or two of a certain mold or take one out, based on what I think I'll need.
