Adobe recommendation (always has been): never work with server files.
No, that really isn't Adobe's recommendation (either now or in the past).
What is true is that we do warn that if your assets (base InDesign documents and/or assets including linked artwork and fonts - such as packaged fonts) are on a server, additional “factors” come into play. These include but are not limited to the real bandwidth between the desktops and the servers (not just the speed of the internet connections at both ends but taking into account any latency issues due to the number of “hops” or distance between the desktops and servers - satellite connections often have major latency issues), connection reliability (the link between the desktops and the servers must be exceptionally reliable), the server configurations (SSDs and enough memory for cacheing), server load, and server configuration.
Many InDesign users work with a server environment quite successfully, assuming the above factors are considered.
And no, it has nothing to do with whether your server is MacOS or Windows based!