I just want to remind everyone why a production blockchain needs to be running on open-source software:
If the code is close source, users have no way to verify what is happening when they use the network. There can be hidden rules, including for monetary distribution. I recommend everyone to be cautious, we have no idea what 22.5 exactly did.
If the code is close source, it's difficult for witnesses to update and run the majority version and produce blocks. It basically puts governance in lockdown, and it's very dangerous for the health of the chain.
(... edited out...)
EDIT: Nevermind, they actually did it 1 hour ago: https://github.com/steemit/steem/pull/3618