There are hardly any withers

Seit Update 1.18 It is in the Nether Fortress where normally with spans. There are no Spwaners because 80% of them only blaze. Black skeletons are usually found in Red Fortresses. Since the update, mainly only wages (Blaze) have been received. All Blaze Spwaner was destroyed. Still, almost all of them are Blaze.

There are hardly any withers