I recently stepped into an elevator and saw this panel:

The panel was clean, full of high quality materials, and everything worked.

Quality is about more than the functionality, does this look like a quality panel?

Everything works!

Push a button and it lights up!

Sure, it might light up red, green or blue. 
And the light might be around the edge or in the center. 
And some of the buttons are flush with the mount, while others extend out; but that doesn’t impact the light turning on.

There are 12 possible button implementations, and 5 of them appear randomly.

But when you push the button, the light turns on!

What does that have to do with SaaS Scaling?

No matter how excellent any individual endpoint implementation is, having an API with endpoints that work differently decreases the overall quality of your product.

Having a UI with mismatched widgets and styles increases the user’s cognitive load and decreases quality, even when the differences don’t change any functionality.

Consistency during the scaleup period can be difficult as multiple new teams spin up, but it’s critically important if you want a quality product.