Why? 1. Mob spawn farming - can kill your mobs before they disappear 2. Picking up items before they despawn - getting to your items after you die, picking them up after you throw them on the ground for a sec, etc. This can either be on screen (like we have established is much more effective) or in chat, perhaps a minute or minute and a half before removal
I'm not sure what the current time between entities despawning is, but I'd like to have more than a maximum of 3 minutes after I die to try and find my things after dying
Well, when a chunk is unloaded, the timer resets due to minecraft logic, and with death signs if they do ever get added could fix this. They could also put diamond armor, tools, and a few other items to have a longer timers.
Ah yes found it. It's only a 20 second warning though, and I haven't seen much of it unless I specifically look for it
There is a 60 second and a 20 second warning for the entity removal. We are looking into the death signs plugin as an addition but we need to do more testing before we add it, so no promises.
To add on to what Death has already said, items on the ground are not removed with the entity removal. This was something that happened previously, but we decided to remove.