Very rough at the moment, with lots of issues that make it an early Beta, but it was nice to be able to scp over the save-hacking bash script I just wrote and have it Just Work, including creating a symlink to the save directory used by the Windows version of the game so that I could easily go back-and-forth between editing and testing. The supplied version of Ubuntu came with an old version of JQ, but I just grabbed the latest Linux binary with wget and all was well.
I’m going to try to build a decent Perl environment with Perlbrew, so that it survives reinstalls and upgrades. Then I can have some fun. If they ever get the Japanese IME working with WSL (or more precisely, their console window), I can have real fun.