I thinks it is best that the behaviour of this potrait mode feature is explained in more detail by the ones involved.

Right now, I do not see any change in behaviour with the latest busybox. But I would expect the xterminal to be adapted for that.

If we get a proper proper portrait virtual keyboard (looks like it is arriving), I would not mind that option. It should switch back to landscape if the keyboard is open.

Until I have seen more info about this, I can't really judge it.