[tzs]

You basically equated the hassle of getting WebGL working if someone is on a browser without it to the hassle of getting Wolfram Alpha Pro.

What you are missing is that if you don't have Wolfram Alpha Pro, the regular plain old Wolfram Alpha still plots it for you. It gives you a 3D view and a contour map, and throws in a couple series expansion and the derivative. You don't get the fancy interactivity without Pro, but you get to see what the thing is.

At Google, on the other hand, you either get the full 3D interactive experience, or you get "3D charts require a web browser and system that support WebGL".