A: Please build a Website for our new product.
A: Please use fancy technology, Animations and stuff!
B: OK, but $_things won't Work on mobile
A: mobile is Not our target audience. No Problem, optimize it for big Screens only.
B: it's 2017 - we need a mobile optimized Page, are u sure?
A: yes, so what i say

A week later...

B: hey a, here is Your preview. Optimized for big Screens, and i didn't Care much about mobile.

A: HEY B, YOU NEED TO FIX $FUNCTIONS ASAP!! THEY DON'T WORK ON MOBILE