It's good to see you guys on Lemmy :)
I tested it a bit a few days ago, but I'll see if I can give it a more rigorous go today. The ones I've found Mojeek to be weak in are bug strings that programs I'm working with spit out. Although I think I've had more luck in the past few months.
That would be the logical conclusion, but I believe Debian uses the old version for years after it's unsupported and might backport security fixes depending on how severe they are. Either way, I personally wouldn't trust Debian or Ubuntu to properly fix security issues with a program (or in this case, programming language) that they do not actively develop or maintain themselves.