He also called them mûmakil in elvish. In my mind, when the Hobbits call them oliphaunts it is because a long time ago someone talked about elephants, and over the years the correct pronunciation was lost.

It would also be very hard to compete with products that are this mature. Linux, Windows, and macOS have been under development for a long time, with a lot of people. If you create a new OS, people will inevitably compare your new immature product with those mature products. If you had the same resources and time, then maybe your new OS would beat them, but you don’t. So at launch you will have less optimizations, features, security audits, compatibility, etc., and few people would actually consider using your OS.