> There are many others

Now that Musk led the way, sure. People laughed at Musk when he started out.

> NASA

Has sent a handful of probes out, only a handful because they are so costly. Now NASA can send out legions of them. There was a previous discussion here about why only one JWST was made and launched, at a cost of $10B. We all hope and pray it doesn't break down. Now with Musk's rockets we can launch lots of them and make N times the discoveries!

(With cheap launches, we don't have to make single machines that must be super reliable. We can make cheap machines at fractions of the cost, and so what if a few of them fail.)

Lowering costs by an order of magnitude changes everything.