Apparently systemd is coming faster to Gentoo than I feared. Here an excerpt from #gentoo-udev:
So, speak up if you support it: Let's redesign the entire filesystem
14:02:29 GMT nenolod | will this kill-split-/usr stuff effect openrc next?
14:02:43 GMT @Chainsaw | From what I've seen on the list a very vocal minority is running the show.
14:03:11 GMT nenolod | the no-split-/usr stuff will force our hand to either fork openrc or something else
14:03:14 GMT @Chainsaw | nenolod: It could affect openrc, if the silent majority does not speak up and let's
| this project die out, the systemd steamroller will be upon us about two months from now.
14:04:13 GMT @Chainsaw | So if anyone is reading this that felt they shouldn't respond to gentoo-dev...
| I think you should. ryao is bearing the brunt of this, and if you do not show your support
| now he may think he's alone in this.