Certainly bizarre. Among other things, almost none of the archived distros can read the RAR format.

It's weird, come to think of it, that RAR has existed for a quarter of a century, and yet the format has never been documented or reverse-engineered and no FOSS implementations exist. The only way to make a RAR file is the official program, which is binary-only shareware; there is public source code for extracting RARs but under a license that explicitly forbids using it to reverse-engineer the format.

But I guess the overlap between people who care about all that and people interested in the kind of stuff RAR is used for is next to minimal.