"World expert" might not even be that bad of a characterization. It's familiar with the ins-and-outs and every major distribution, every DE, is fluent in debugging at any level (knows every network utility, container technology, systemd option, sysctl, how various subsystems plug together and how to use them in practice, etc.), knows how to look up what it doesn't know if it's not up to date to within the literal last month or two, and if it came down to it, could patch/fix things, including reverse engineering hardware drivers.

I wouldn't be surprised if it could better deal with Linux issues than Linus.