The DZS|All-In-One have decided to take turn working with S-Ext and Phasor CE.
As of S-Ext 0.3.0, there are still some work in-progress for events in-sync communication and few additional controllers inside halo which will be also support in add-on system as well. Plus there are some conversions needed for some/most functions in-order to support multi-version and native C language to work with any C language.
As of Phasor CE, we are working with Oxide to port his Phasor into Halo CE for his community. The progress is slow and it does take time to port it over.