No comment on anything else, but the tone of the page is so schoolyard. For a company that targets enterprise and government clients, petty jabs at the weather app look unprofessional.

The "Comparison" section of the Product Ownership also seems rather ridiculous, where NextCloud is just a questionable "fork" while ownCloud glouriously carries the torch of product ownership. Especially since it's placed directly below the "License" section. Apparently, someone didn't quite understand the idea behind the GPL.

Especially since ownCloud was started originally by Frank Karlitschek who left to fork and create Nextcloud!

This is just like Oracle claiming OpenOffice is the better project and the LibreOffice fork is a shady knock-off.

Contempt and snobbery are no way to win customers

With Owncloud having been bought by Kiteworks it’ll be interesting to see where they’ll be heading product-wise.

The one legitimate point that page makes is that it's scummy that Nextcloud paywalls its documentation. See also https://www.gnu.org/philosophy/free-doc.en.html