I remember when i and my dad (i was playin with him, still do) didnt know inventory items despawn. I died in a desert very far from home and dad said:"dw i built a little barrow around ur items" so i ran there. And after 2 Minecraft days of running
(i accidentally hit post comment)
I broke the barrow and nothing was inside
I was very zad cuz all those items were 'kinda' importatn
So my dad gave me diamonds to remake my things and i was happy again.
This was 1.12.2 btw. Old times