For better or worse, Elon Musk’s SpaceX currently has a near-monopoly in the industry, with its reusable and freakishly reliable Falcon 9 rocket performing flights on a regular basis.

Source: https://gizmodo.com/beyond-spacex-the-rising-stars-of-the-u-s-rocket-indu-1850780443?utm_source=regular

Sega broke Nintendo's near-monopoly on game consoles, then lost it all to Sony and was forced to retreat back to the arcades.

Source: https://boingboing.net/2023/07/08/skyream-voice-actors-displeased-by-smutty-game-mods-using-ai-to-clone-their-voices.html

Today, 33 years after it was first launched on Windows, the Silicon Valley software has become ubiquitous in meetings, classrooms and online collaborations with a near-monopoly over the global presentation software market.

Source: https://www.siliconrepublic.com/business/dennis-austin-death-creator-of-microsoft-powerpoint