Sounds pretty reasonable, though I am unaware of any efforts to convert HIMARS into a common launch system, I doubt it would be difficult to do it.At a guess? At best a continuation of 2024, with increased focus on passive and cUAS systems. Likely direction that Army launchers are to shift to being more common - so that instead of buying a Patriot or Standard, we buy any SAM that will fit in a HiMARs pod. Or similar. That gives CJOPS options - and the threat doesn't know if it's a GMLR, AShM, SAM or hypersonic missile. And, lets not kid ourselves, a common launcher should be simple to build from an industry point of view.
I don't think there will be land based MR GBAD effect in service for a while; certainly not one capable of defending multiple points. I think all the FIC will be in place, and it will be a quick capability to raise, but the missile units will be the last pieces.
I recall though that MR GBAD was to be deployed by the RAAF, not Army. Are they under similar constraints as Army when it comes to deploying new capability?
They don't seem to be, when it comes to shiny new aircraft...