This is the unfortunate reality of a lot of Rust projects. There are of course some who don't fetischise the language and there are of course community members on both sides but from the outside it makes Rust look so, so unappealing and almost like a cult.
I like that it's written in rust and that they advertise this. It's not "fetishism" as much as it is just interesting. It's also likely a big part of why they can have a "launch web editor button" that instantly works on my phone.
At least it's Graphite, written in Rust, and not RGraphite or GraphiteR. I feel like it hasn't been long enough since every Java app started (or ended, for libraries) with J.