Here is a small conversion detail that is easy to miss. Stock positions on the platform can be recorded with up to nine decimal places, while bStocks support up to eight.
If a very precise position is converted into $COINB, the tiny amount beyond eight decimals cannot be represented by the token. Binance classifies that residual as a rounding difference, not a conversion fee.
It will rarely be the headline feature, but this is exactly the kind of detail worth reading before pressing Confirm.