More likely than being sexist or ageist, the author probably had his granny in mind when he was trying to think of the label. I agree that it's not a very good

More likely than being sexist or ageist, the author probably had his granny in mind when he was trying to think of the label. I agree that it's not a very good one though; it's too specific. I don't really agree on your wider point, though. Car manufacturers do absolutely distinguish between "car drivers" and "granny car drivers", and also between "boy racers", "mums on the school run", and so on. If you're going to manufacture a new car, you need to know who you want to sell it to. The same should be true of computer platforms.