> when is the language going to hit a stable very LTS version that won't be touched for a long time?

Is there any reason to be rushing it? Zig isn't languishing without activity. Big things are happening, and it's better in my opinion for them to get the big important stuff right early than it is to get something stable that is harder to change and improve later.

"Competing with C" means innovating, not striving to meet feature parity so it can be frozen in time. It's not as though C has anything terribly exciting going on with it. Let them cook.