[colshrapnel]

Stack Overflow largely relies on Google Search, but for private teams it won't be available. And internal search is just unreliable.

Also I fail to see how answers on SO for Teams are supposed to be less "stale" than your old wiki articles.

For me, at least our corporate wiki is more organized, without duplicates, whereas Stack Overflow's modus operandi is largely relies on creating thousands of duplicated questions.