Time Machine support is also dropping support over SMB1 so whatever new solution needs to support SMB2/3.
Where "new" in this case could be a NAS running Samba from 2011? Samba added official support for Time Machine much later, but I think it was possible on earlier versions with some extra steps.
I've added support for Samba 4 (running SMB3) to the Time Capsule so it can work with modern macOS: https://github.com/jamesyc/TimeCapsuleSMB
SMB1 has major security issues but even those ignored (which a lot of people on private home networks shouldn't be too worried about) it's also slow as hell on MacOS
SMB2 came out with Vista and SMB3 was Win8 so they are not new protocols either.