I'm not sure I understand, but this seems like a lot of work for little reward. Newer versions of Emacs function with the C library that's missing these dumper hooks and if you have a newer C library, you can update to a new version of Emacs.
This seems like a lot of work for people who want to stick with an older release.
Perhaps a related question: how essential is this functionality? I use Emacs on Mac OS X, which does not even have glibc. Yet the article suggests that this is only present on glibc. So should I be appalled at how long it takes my Emacs to load? Seems to me it's just as fast as it was on GNU/Linux.
This seems like a lot of work for people who want to stick with an older release.