Tl;DR - Apple's own apps tend to be quite good at not tracking you, whilst others call a wide variety of proprietary and third party tracking endpoints.
439 karma · joined April 1, 2021
Finally there are very few orgs worldwide even with a few hundred k employees and any firm would get huge Microsoft discounts at that scale for products like SharePoint (on prem), Exchange (on prem) and Office Server (on prem also)... and oodles of support over a very mature product which Nextcloud is simply not.