Also I'd like to add to my original comment above: I don't care at all that this is implemented in Rust. Good on you. Open source software goes where the developers go, and isn't dictated by anything except what the developers want to do.
Also I am not bothered by it; I personally find it interesting when a tool is implemented in a language that I find interesting. If it's a language I don't care about, I shrug and move on.
Are you bothered when somebody says "implemented in C 99"?
If you're at the point of looking at the source code, The language used for implementation might actually be relevant to you, when making a choice about whether to use a piece of software or library.
Library - yes, of course it matters what it's written in when I'm choosing it. Software - no, not really, as long as it does what it's supposed to do, C, C++, go, erlang, java, kotlin, python, julia, rust or brainfuck for all I care - sure, god speed.
Ironically, I felt this was your strongest argument because I am bothered when someone says that... like, I am first bothered that someone thinks the language their tool is written in is a selling point, but then I am additionally bothered (even somewhat enraged) that anyone considers their project being written in C99 (and not at least C++, and even explicitly so) to be a selling point!
Like, whenever I see "implemented in C99" I tend to be able to very quickly find a few buffer overflows or memory leaks as it is so hard to dot all your eyes and cross all your tees manually in every single function (with the consequent annoyance that I say the code is likely buggy, get challenged to find a bug, find multiple sometimes only even a few minutes later, and then the goal posts shift to "well we fixed the bugs you found, so we're fine")... and so I guess "implemented in Rust" us at least telling me the code that implemented the tool I am about to use is more likely to be correct? ;P
> so I guess "implemented in Rust" us at least telling me the code that implemented the tool I am about to use is more likely to be correct?
This was my point! It's information for potential consumers, that might or might not be interesting or relevant to you.
Also some people just like talking about how they did something, not just what they did. Maybe they're proud to show it off or they want to let people know about whatever cool thing they like.