You can never have too much RAM.
The more the computational device can utilize, the better & faster it will run.
Between multiple open tabs, streaming music/video, an email client, & processing all those megapixels, you'll want as much as you can afford to have installed. This goes for desktops, laptops, & your SmartPhone.
You can have ludicrous amounts installed, like 1Tb in a SmartWatch, but that's merely silly/overkill.
Or is 640Kb still enough for you? ;-)p