The way they talk about it makes it sound like they invented the written word, but that notwithstanding the fonts actually look really nice in my opinion.
I can't shake this feeling that these are lacking something, like I remember looking at Fira for the first time and being like wow, even jetbrains mono had a sort of generic charm. These on the other hand, are just meh.
Maybe they are someone's cup of tea though. I am sure in 6 months I will be hearing about how GitHub invented the developer font of some rubbish like that.