Back in October on Phoronix I wrote how Debian would be switching to Upstart or Systemd, but the ultimate decision would be left up to the Debian technical committee. More and more distributions are switching to systemd, but Debian-based Ubuntu remains committed to Upstart, and Debian is concerned about non-Linux kernel support too where systemd isn't really an option.
Ian Jackson of the technical committee in the past few days has been sharing a number of bug entries / mailing list posts about his evaluation of systemd vs. Upstart. Ian concluded he's in favor of Upstart. To Upstart's benefit, Ian says, it's simpler than systemd, the integration is better into a daemon source code, it's easier to package, the community is much better to work with, it's more portable, and its disadvantages can be more readily fixed. Overall, he feels Upstart is the best choice over systemd or SysVinit or OpenRC for the next Debian release. This long-time Debian developer was also a former Canonical employee.
Russ Allbery of the Debian technical committee, meanwhile, came out yesterday. Allbery is in favor of systemd over Upstart. His response was the opposite of Jackson's. He feels that Upstart trails systemd in features, they should go with systemd so Debian developers can focus on new issues rather than re-doing component integration that developers have already done for systemd, and that it's a "clear choice" going with systemd even though it faces portability issues with non-Linux platforms.
More details forthcoming as the rest of the technical committee and Debian developers at large continue in their very polarized discussions.