Justice and Rule
Legend
If anything, it just suggests a hidden sacred cow that the designers did not realize they were slaughtering....it has just occurred to me right now that "sacred cow" is kind of obviously offensive as it refers disparagingly to real world religious practice. Is there a sensible replacement idiom around?
You could probably use the term "third rail" in a similar usage, being a topic that, when touched, usually draws severe backlash. It's not quite the same, but probably close enough for jazz.
The Bloodied condition arguably belongs in this list as well.
Honestly I would love to see something like this brought back. It's a very simple thing, but probably better-understood by the audience. Unlike many of us older players, they have now grown up on years upon years of Fromsoft-style bosses who proceed into different stages upon passing certain damage thresholds. That's just a basic style concept for combat design for them.
Tastes vary.
I like them pretty much across the board, possibly with the exception of the daily surge limit, I played in a 4e game with the numbers reduced down for an encounter basis of surges and it was fantastic.
Honestly, looking at it now, I kind of like daily surges because it creates a fairly easy and interesting attrition that I always feel like the more simulationist D&D stuff is trying to get to but also failing at.