Spacex is built on the “iterative and incremental development” model. Basically, build it, test it to destruction, take the knowledge gained and build it again, etc. until you have it darn near foolproof. It’s how they built the falcon 9 and falcon heavy rockets. Now those things go up and come back down like clockwork.
CC
Yes I know how space X works but thanks for mentioning it for everybody else.
They plan to have 6 more tests this year! Prep for Flight 4 is underway now.