[eredengrin]

Not sure if you are referring to the title specifically or the trend in general, but the title is taken almost directly from the one sentence blurb on the wezterm site. As a general description, I can see why as an open source project it would be useful to include the implementation language as one of the first descriptors of the project, and this seems to be fairly common practice. For example, look through just about any This Week In Matrix [0] blog post and you'll see various projects described as "x written in C" or "y written in C++17" or "z written in kotlin" etc. Programmers/sysadmins are curious so for a tool aimed primarily at that demographic, I don't see why a project shouldn't include that it's written in rust just to avoid grouping itself with the other trendy rust projects (as you likely wouldn't have complained if it were written in eg c++ and advertising that fact in its one sentence description).

[0] https://matrix.org/blog/posts