Simulation Distance Does Not Effect Entities In The Game.

Steps to Reproduce:

1. Create A World With 6 Simulation Distance
2. Summon Any Entity (Preferably An Armor Stand)
3. Go Around 6  Chunks Away From The Armor Stand
4. Use The /testfor @e[type=Armor_Stand]

Observed Results:

Armor Stand Is Still Detected.

Expected Results:

Armor Stand Should Be Unloaded.

Notes

The World File I Was Testing On You Can Download Here: