Just wondering - encoder pin-out orders?

I've always assumed pin-outs are what they are, deal with it. But I thought I'd ask just in case I'm missing something. Are there particular reasons that we see different pin-out orders for encoders (and seemingly everything else)? I'm pretty sure this is just driven by multiple design realities each engineer or team has to balance. Yeah?

Best,
Jack
 

What's that saying?

"The good thing about standards is that there are so many to choose from"

--Andrew S. Tanenbaum

Roger that! Thx.