I'd argue the bigger counterweight dragging down expected performance gains is lost agility.

The more parties in a system, the more ossified it becomes. (Hello, healthcare)

Inevitably, the world changes... and now because there are so many intermediary layers the system as a whole is unable to adapt.

Then you're left with a system that can't be changed, that very efficiently does something different than what you need it to do.

Or, in a nutshell, most enterprise software older than 5 years.