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"... SpaceX, dominant though it may be today, would benefit from some real competition. But space is hard, as veterans of the field like to say, and the legacy aerospace companies, like Boeing, that dominated the Apollo, space shuttle, and ISS era of spaceflight will need deep cultural shifts to compete in the new era of entrepreneurial discovery."
https://www.city-journal.org/article/can-boeing-catch-up-with-spacex