I reckon this construction also lends itself well to “hiking” socks, where you can reinforce the foot part (by using a different stitch, or thicker yarn- provided you can calculate the different gauges) for extra cushioning. I might try it! (I haven’t managed to knit a pair of socks...
The key to casting on for socks is casting on LOOOOOOSELY… Remember, the sock has to not only fit over the toe and circumference of the foot itself, but it also has to stretch to fit around the widest part, where your heel is all chunky. It can be stretched to the max to fit ...