It doesn't matter. If you followed my posts in this thread, you'll see I was just asking for a few official options to make the game more like it was before so I don't have to resort to homebrew rules or OSR retro clones.
Everyone insisting 5e doesn't go out of it's way to prevent PC's death either aren't being completely honest or aren't really getting my point.
That's all.
It might be that the intention of 5e's creators to offer a PC are quasi-immortal style is to target younger players (or in general players) who might not take it so well, if their character succumbs. But that is just a guess.
I admit you can play 5e that way , that you do not like and criticize, it is also not my kind of prefered style. But 5e offers the toolset for both you just have to use it. So imho it comes up to what playstyle you prefer and what parts of the toolset you use and how.
See, i can find no statement anywhere in the RAW, that a dragon is not allowed to down the poor party wizard for good within one round, i can find no RAW that ghouls cannot start chewing up sub zero hp characters and thereby killing them for good, if a healing spell or anything similar is not immediately applied, but the cleric or whoever capable to do so, might be occupied fighting for his own life in this situation.