“What we have works fine, why change.”
Why they say it. Works fine means functional, not optimal, and humans default to the known over the better. The status quo bias is strong because change carries effort and risk while staying carries neither, on the surface.
Do not: Do not tell them their fine setup is actually broken, which insults their judgment and triggers resistance.
And if it genuinely works fine, you should keep it, I mean that, change for its own sake is a waste of everyone's time. The teams that moved were not running from something broken, they just realized fine was costing them more than they noticed once they saw the alternative. Where would you say fine actually slows you down, even a little?
Then ask. If a competitor of yours moved off fine and pulled ahead, how long before fine becomes a liability?