Comment by avar

Yes, although having never been at Microsoft (and thus just speculating) I wouldn't underestimate the managerial effect of siloing either.

There are many tricky problems in major companies that are actually relatively easy with say a month of developer time, but any single team affected by it can't justify that over a workaround that takes a week to implement.

Then nobody adds up cost of 10 different teams needing to each repeat that twice.