Mark -- I'm here to ask that you please reconsider the cutoff point between desktop and mobile menus.
Visually impaired people continue to struggle with it (ref: https://groups.io/g/GroupManagersForum/topic/80693046). It's difficult to explain why their menu items have disappeared when they haven't changed anything. Even those who are not blind may need fairly high zoom to be able to read the content.
This seems like a high price to pay just so users of some tablets don't have to rotate their device by 90 degrees. Thanks for your consideration.