Does merging packages make Sims run better?

I have merged CC too because instead of downloading hundreds (actually, thousands) of files from a single creator, I decided that it would be easier to get entire collections as single files, which was true ... but as @jyotai says if some of that CC becomes outdated, it's not an easy fix. I can't just remove the outdated bits from my CC folder, but need to actually unmerge everything and redo the collection just for a few things.

On the other, my game loads in no time at all, but I think that has more to do with my specs than how I have my CC organized.