This past week, the latest PHP RFC, Deprecate Dynamic Properties, passed 2:1. It just barely met the 2/3 vote threshold for passing, which of course can and has been spun in various pro-and-con ways. The RFC covers the change itself fairly well so I won't go into detail about it here.
The main argument people had against it was that it involves triggering deprecation warnings. Which... is kind of the point. That's kind of all it does.
This is not the first time that debate has come up, but it's been coming up more frequently and we, as PHP, need to improve the answer.
(Continue reading this post on PeakD.)