The home screen on iOS only rotates on the latest version, iOS 8 and the launcher on STOCK Android doesn't rotate at all, note that I said STOCK and not with a third party or manufacturers launcher.
Reread my post, I didn't say that NO ONE uses their phone in landscape, I asked HOW MANY people WOULD use their phone in landscape!!!!!
Reread, comprehend, then comment!!!!
As mentioned before, I would.... Typing this and posting this in landscape mode
People wonder how many would use this and some would say hardly anybody would use a landscape start screen.... But that's hard to judge when the option has never been given to you to try in order to know one way or another.
Ignorance is bliss perhaps?
I have an android tablet, which is in landscape mode 98% of the time, yet it does support portrait style..... Why it supports portrait, I don't know, but the option is there.
I would use landscape on my 930 very often. The only time I use a portrait view is when I am forced to do so.... Such as an app only being portrait, or if I only have one hand available to use.
Also, the Start Screen on Win 8.1 & 10 (PC) is obviously landscape and for many reasons. While a mobile screen is smaller, many of the benefits for landscape viewing still exist.
A good example is how people take photos or videos on a phone.... Do you prefer the tunnel vision look of videos & pictures taken portrait style or landscape, which is generally more natural for our viewing?
Different situation than compared to a menu / start screen, but the core principle remains the same.
Viewing most things in portrait on a phone feels like looking through an old keyhole and missing a lot of peripheral vision.
Sure it's still the same size and space no matter which way you rotate but for me it's about what feels natural.
I can type faster in landscape than I can in portrait. I can have text and other details larger for viewing and I don't have to zoom farther in like in portrait in order to get the same sized viewing. In landscape I can heave a nice size viewing area where I only have to pan up or down, compared to portrait where I need to zoom even further and then have to pan in all directions to get the same results.
Sure in portrait, you can see more lines of text, but that doesn't help if you can't see the remaining words in the previous lines because they're cut off.
Thus, more work.