PBC is a completely meaningless label. The only reason it exists is bluesky advertising. Bluesky is a corporation the same as any other.
PBC changes one thing from a C corp, as I understand it, the investors cannot sue over financial stewardship and the related.
It's not much, but it's also not insignificant and does mean they can prioritize something besides the investors
I personally run my own PDS for my friends and I, use my own AppView that fetches from my own Constellation, and rely on an alternative relay. I also don't like PBC's moderation, so I simply disabled it, and even if they block/ban posts or accounts on their part of the network, I still see them. But yes, I would like the DID directory to be decentralized. I still depend on it and can't easily move.