Code review comment for lp://staging/~vorlon/ubuntu-archive-tools/kernel-sru-release-to-devel

In recent cycles we have found that interlock with the compiler, binutils, and now particularly Nvidia binary modules that we are no longer gaining much from trying to copy those forward. We have moved to doing 'forward ports' as +21.04 so that they build with local versions of the toolchain and can select updates Nvidia binary modules.