The SpaceX IPO prospectus offers a fascinating window into the spectacular death of Twitter

After months of anticipation, Elon Musk’s SpaceX finally made its S-1 financial filing and business prospectus public for all to see. The document, filed with the Securities and Exchange Commission (SEC), makes an ambitious case to investors that Space Exploration Technologies Corp.—yes, that’s the official name—is poised to build a future for humanity that will include cities on the moon and other planets. But perhaps unexpectedly, the prospectus also offers a fascinating autopsy of...