Reason: I’ve already signed up as a volunteer for the Rust-SIG and seeing as core maintainers are also sought for, I definitely can imagine helping here.
Experience: Most of the things from here apply here too. In addition to far-reaching Rust experience and being a nixpkgs contributor all over, I do have my fair share of experience with the languages (i.e. C and C++) used by most core packages in (nix)pkgs as well, so that’s no hurdle at all for me. I’m familiar with Arch and Debian packaging as well (latter due to $dayjob), which can helpful too in certain situations as well as reference, I suppose.