Considering the device was designed with chrome in mind and chrome routinely consumes 50% of my 8G (so, yeah 4G) I do believe that "Chrome + anything else" would qualify as over the limit of this device's ability to deliver.

FWIW I don't need much ram otherwise, I live in the CLI which tends to be much leaner. But I do not have to justify needing more ram, I desire it, I currently have it, and the cost of my machine twice over is still less than the cost of a Pixel.