I would guess the last one was the impetus for this petition.
This petition seems childish.
Plus, you can do a dry-run with a limited number of machines and you can select a distribution which seldom changes (Gentoo switched to baselayout2 after.. years, Slackware still has tarballs as packages). Unlikely that they will push radical changes soon.
I replaced the BSD-like init system in Arch, because it is buggy. And I can dual-boot init-systems now.
Lennart's not even planning on documenting the format.
If you ask for possible reasons to attack Lennart in the first place: He was the main force behind Pulseaudio (which, for various technical and political reasons was reviled for a long time) and now systemd (a C replacement for the sys-v scripts, think smf/launchd).
Besides, looking at how things go in that area, now that it works well enough it will probably be replaced quite soon.