The post I was replying to was saying that SpaceX had no growth and therefore little value. That's a mindset that sees companies as speculative assets that are only valuable if their price is set to change in a way that a speculative profit can be made.
SpaceX is making money and doing well, the business fundamentals are working out, and it is valuable because of that. If it turns into a boring, stable, company then that's a good thing - it's less likely to spend $10B of shareholder funds chasing some sci-fi pipe dream (instead of, say, spending $1B testing its assumptions first) in the hope of continuing to be valued as a "high-growth" stock.