https://www.w3.org/WAI/WCAG21/Understanding/orientation.html#examples

Example 5 talk about room for "enough of the keys", what is enough of the keys? Seems to suggest if you have room for a certain number, it's fine, like 8 keys, and not for others?

An example where orientation is essential could be a piano app that requires the device to be in landscape mode to allow room for enough of the piano keys to be functionally usable.

I guess we want them all to have enough room and probably wanted to say it this way:

An example where orientation is essential could be a piano app that requires the device to be in landscape mode allowing the piano keys to have enough room to be functionally usable.