I have never used a polygon network, but I often use the BSC network, I think for now the BSC network is commonly used by all, low fees and fast transaction processing are an alternative choice to ETH. Polygon is a new project, they have to prove if their network is better than BSC or there is a unique advantage of polygon network from BSC to beat BSC and it takes a long time.
I think for now Bsc is still superior to polygons. But not always the advantage of Bsc can last. Considering a lot of scam coins that use the bsc network. Polygons are still a new network. Judging from its development, there is a possibility that polygons will develop and become popular in the future.