I don't share the author's view of the OSs becoming copycats of eachother and not that specialized.

Truth to be told, a NAS is the perfect place to have your home server. You can have both your applications and data on the same device and avoid having to build a lab just to have nextcloud or some other utility self hosted. However, to achieve this, the OS must become more similar to a normal linux distro, for better or for worse