This discussion isn't about if the phone can be used in landscape more or not. It's about the home screen rotating in landscape mode. No one is saying apps won't run in landscape mode. Just that your home screen can't be orientated to landscape mode.
It's highly related - As previously said, I enjoyed the choice of using my phone the way I wanted - in Landscape, this was perfect - when in a landscape app, you could go to the home screen, change apps and carry on with ease.
Without the home screen in landscape, it breaks the user "flow"... if it isn't on the app switch list, you have to go home - then rotate the screen, then click the app and rotate it again...
So, whilst I mentioned a use case for me, it's VERY annoying that the home screen doesn't work in landscape and that was the point/reason I posted here.
An example again is satnav in the car - I love Waze in landscape... if I quickly switch (when safely stopped) to check an address or similar, the phone often loses rotation when going to the home screen, meaning that you have to pick up, change rotation to portrait, then back to landscape.
So - yes, I use apps in landscape, but, I want the home screen to work that way as well!