Help, support CPM build

Ahh if i understand it correctly the current NG branch is EOL and this is the only one that supports FEL. The new NO branch dosent support FEL and in the future would probably work with the am6+. The main reason I would get the box is because of FEL and I would also use the cpm build. And if im correct to use it with plex I would need to use pm4k? Now I wonder if this setup could stop working in the future? Or would pm4k still get updates?