For example, if I have 100 usd worth of each X, Y and Z coin, can I withdraw only 10 usd worth of Y coin?
You are playing with your money, but the result may not be good, I will advice you to withdraw all you money from binance if you do not want to get verified on binance. I am still surprised that some people will still have this type of question.
yes, especially with one login he can check limits on his accounts. but I guess he expects to hear some secret way here how to still use Binance without passing KYC.
He can withdraw his money, but he can't trade or exchange in any solution. So he must withdraw x, y and Z coins, he can't exchange them all to BTC so then withdraw Bitcoin.