There's a number of advantages of choosing G over N for your device.

How much bandwidth do you require? The EZ-Robot EZ-B v4, for example, requires a maximum of 3mbps on each channel (comm and video) totallying 6mbps. Due to it's internal UART comm between peripherals on the physical PCB within the microcontrollers, there's no possible way of having faster communication

Compatibility While N is supported on nearly all recent hardware, there's much larger compatibility with G

Distance G is generally stronger in distance

Manufacturing Cost Components cost money - the hardware of the EZ-B v4, for example, costs money to manufacturer. The cost of hardware has to also accomodiate the engineering salaries, electricity bills, parking lot, heat, water, chairs, desks, pencils, multi revisions, shipping of all individual components to assembly plant, boxes, shelves, light bulbs, laptops, mouse pads, coffee, coffee, coffee, coffee, coffee, etc.. If you needlessly increase the cost of hardware, you have to somehow justify the increased MSRP cost to the customer. Would you want to purchase something that was N WiFi even though the physical max communication internally is limited to 6mbps?

It's true. We do drink copious amounts of coffee!!

Alan - i put that there for you, ahewaz and amin - since i run on milk and ice cream... you guys run on coffee. Everyone else at the company merely puts up with us

And cost of peppermint of course