Yes, Proot is useful, but limited. It will be somewhat slow in some cases and not do the right thing in others, like interpret shebangs as expected, as namespac

Yes, Proot is useful, but limited. It will be somewhat slow in some cases and not do the right thing in others, like interpret shebangs as expected, as namespaces will. In most cases you can run HPC stuff by installing packages under proot and setting paths in the environment appropriately to use the resulting root. (I don't know if that's the case here, or if it means running under proot.) No, you certainly can't run your own kernel that way.