One of the more recent experience I've had pushing a skill from conscious competence to unconscious competence is in a multiplayer video game that involved very large scale fights that literally hundreds of players participate in (and I'm using the word literally literally here). Imagine Starcraft or a Civilization game, but rather than one player controlling an army of units, each unit is 1-is-to-1 controlled by a player.

I clearly recall how I started out, I was lost in a deluge of character models and health bars surrounding my screen, moving about, particles flashing from abilities. I had a difficult time listening to calls by the leader of my group (effectively, everyone is being coordinated by 1 person in a voice call) while trying to make sense of what's around me. I couldn't tell when I was in danger, or where I was supposed to be relative to the rest of the group. It was intense trying to parse everything around me.

But after years of practice (playing at a decently competitive level with other like-minded players who wanted to truly dedicate time to something they found worthwhile), everything in those fights just becomes clear. There's no friction in the hundreds of character models as they enter and exit my screen, reading the flow of combat is as easy as reading a cozy piece of fiction.

I think the way I'd describe the whole experience of learning this part of the game is I learned how to separate important states to non-states. When I started out, I did not know what information to immediately prune out. I was busy juggling a network of useless information and made a mesh of "non-states" that filled my mental capacity. The more I learned, the more I could actually build an intuition of real or important states to be aware of. This one flash of red means I'm in danger. This flash of yellow from an ally means I should advance more aggressively, etc.

If anyone's interested at what I'm describing, here's someone's gameplay: https://www.youtube.com/watch?v=gaZhda3rWvU