Ah, yet another Elon Musk invention. Will it work as well as the SpeceX rockets or cave submarine and the promised level 5 self-driving..
I don't know if you noticed, but the SpaceX rockets work extremely well.
But the cave submarine and the self driving do not. GP forgot to add a question mark.
I sure hope it works as well as SpaceX and the self driving, both are amazing marvels already. And aren't even complete yet!
How are the wildly successful and impressive accomplishments of SpaceX comparable to the cave submarine or nonexistent level5 self-driving? One of these things is not like the others.
That is what the comment is saying: will this work like one of Musk's "successes" or like one of Musk's "failures".