Other companies before them have tried the holarchy/holacracy thing. As far as I can tell, the general conclusion is that there's such a thing as too little middle management, as well as too much.

See for example: Medium (https://blog.medium.com/management-and-organization-at-mediu...), Zappos (https://www.huffingtonpost.co.uk/entry/why-you-need-a-boss_n...)