That reviewer will be forever unsatisfied until Linux manages to cover all main and niche markets. That won't happen because there's no market drive for it. There's no company with a huge budget trying to develop a consumer-tailored Linux-based OS: the other two companies that develop consumer OSs do it just to sell additional hardware (Apple) or services (Microsoft). And expecting a community of people, each with their own interests, to just work for a goal that's not their own is but a fool's dream.