I don't think so, at least not immediately - network Time Machine backups are supported on a wide array of third party NAS style devices, much the same as it wo

I don't think so, at least not immediately - network Time Machine backups are supported on a wide array of third party NAS style devices, much the same as it worked on Apple's own Time Capsule device. I did a similar thing on my home made NAS server box to allow it to appear as a network Time Machine volume "natively" recently too. It's a pretty popular feature on the usual NAS players like Synology's products as well. That said, the focus is clearly much more on iCloud these days, Time Machine feels like it hasn't seen development in years. I was lamenting its slow performance the other day.