The only reason for a Mac to come with more ram out of the gate is if software requirements suddenly balloon to the point where 8gb ram is no longer enough. You might have better luck writing to app developers asking them to make their apps more bloated and seeing if Apple will respond in kind.
The thing is apps are already reaching that point even without intentionally making apps any more bloated.
With chrome and only those tabs and activity monitor open, I'm already at
8GB RAM today is bare minimum when you use it together with swap. This is Apple's planned usage intention.
But that sucks.