In a way it's too bad SpaceX did such a great job on the Merlin engine used in the Falcon 9 and Falcon Heavy, the Raptor 3 just barely improves on the thrust-to-weight ratio. Based on the thrust and the specific impulse, two Raptor 3 engines could just about replace the 9 Merlins in a F9 equivalent design future vehicle. The FH will be replaced by the Starship and/or its booster.
I got thinking about this because the Sierra Space Dream Chaser minishuttle, and its apparent need for a new ride to space. It hasn't actually been to space or been tested in reentry conditions, but if that works out in some flight tests, and the recycling cost and speed works out, it could become a nice crew option for orbital space.
There's some speculation online that ULA (United Space Alliance), which is up for sale, could be purchased by SpaceX. That would be hilarious, but I doubt that Musk will jump at the chance.
The current plan is to use Dream Chaser for a cargo vehicle which seems like overkill. The company has a plan for a dumpster-like module fitting on the rear, and that would hold much of the cargo, and be reused for ISS waste disposal -- loaded, pushed away, burning up on reentry. In that case, what's the purpose of the glider?
Id the ISS is scheduled to be destroyed in 2035, just 10 1/2 years away, why are these companies building space vehicles to service it?................