I think the reason which the author glossed over is because it reduces the number of RTTs between the front and back end. On desktop, you typically have a much

I think the reason which the author glossed over is because it reduces the number of RTTs between the front and back end. On desktop, you typically have a much better internet connection where packets are less likely to get dropped and will generally arrive faster meaning that the performance impact of having a large number of RTTs is much less than on mobile.