Yes. I started using it years ago and have been unable to exit ever since.
But honestly related to your question, I started learning to use vim exactly because when I started to learn and use Linux I was often stuck in situations where that was the only thing available.





It’s important to differentiate between being a monopoly, and engaging in monopolistic behavior.
Valve, to the best of my knowledge, isn’t doing anything that prevents or stifles competition. As a monopoly it’s important to investigate them from time to time to ensure this remains true. But if they’re just putting out the best product and everyone is choosing to use them, then it’s not really a problem.