You know the superiority of one platform over another sometimes doesn't matter. As long as developers keep building on, let's say, ETH, these platforms only stand as niche. That said,
BSC has existing projects, and only 20s have volume. This is a chain backed by the king "Binance."
Polkadot seems "untested" at the moment, and they will have a bigger challenge than BNB.
POS (or anything that involves staking) = centralized, end of story.
I believe on this aspect as well. It is how you market your features to the public. Even if you have cutting edge technology but people are hesitant to use it because they are not comfortable with it, you are still defeated in terms of adoption. People should see it as user friendly and not too complicated to understand. Some users are hesitant to use other networks because of the fear that they may lose their funds along the way. And what I am seeing as advantage for Binance is that they have large user base already and from time to time they airdrop their traders like the latest regarding TWT tokens.