Profitability aside, SpaceX has indeed produced reusable orbital rockets, and Tesla has indeed produced salable, useful electric passenger vehicles. My comment (and this thread) is about the feasibility of the core technology itself, which is in question.
The idea is that if all of the things you have tried have worked out and done what it says on the tin, perhaps you aren’t trying to do a sufficient quantity of impossible things. :)
The idea is that if all of the things you have tried have worked out and done what it says on the tin, perhaps you aren’t trying to do a sufficient quantity of impossible things. :)