Am I missing something here? Is this a new font or something? Is it a recommended mono used for coding? Do people like it?

I am pretty happy with Monaco

I've been using Monaco for years. Something about it is very pleasing to me. However, I'm sort of bored with it and haven't been able to find a suitable replacement.

FiraCode https://github.com/tonsky/FiraCode/ ;) ... I actually like it.