Implementing graves/tombstones

One thing that is frequently implemented as a mod is a way to store your items in a spawned grave block when you die. This keeps your items from despawning but still requires you to go back and get your items. It makes sense that maybe not all players would want to have this implemented as an official change so for the players who would like to remove some of the mood killer of losing all of their gear forever, but dont want to make it so easy that they never have to worry about dying at all with keepInventory. So maybe like the other gamerule exists, a spawnTombstones gamerule or something similar could be implemented that is turned off by default, but can be turned on by players who want it. This would make a lot of players happy (me included) to have a good way to keep some added stakes in dying but not so much to the point that it is enraging to watch all of your hard earned items disappear forever.