I know there are many mods/add-ons that add a headstone at the point of one's death that saves their inventory when they die. (I looked for a 1.13.1 version of these mods, I did not find one). I propose that we add some variation of this system when one becomes available.
I have personally lost hours of work through unavoidable deaths that a system like this would have helped me recover.
I personally would be for something like this. However, as an alternative to saving the items in a nice little gravestone, is death death markers. If I remember right, the headstone mechanic also includes a waypoint/marker of said death. If we are against saving items upon death, how about at the very minimum a waypoint so we know where we died?