Use generalized iteration

demo/src/ServerScriptService/systems/mobs.luau

@@ -34,11 +34,11 @@ local moving_mobs = world
 local function mobsMove(dt: number)
 	local targets = {}
 
-	for _, character in characters:iter() do
+	for _, character in characters do
 		table.insert(targets, (character.PrimaryPart :: Part).Position)
 	end
 
-	for mob, transform, v in moving_mobs:iter() do
+	for mob, transform, v in moving_mobs do
 		local cf = transform.new
 		local p = cf.Position
 

demo/src/StarterPlayer/StarterPlayerScripts/systems/move.luau

@@ -11,7 +11,7 @@ local Transform = cts.Transform
 
 local moving_models = world:query(Transform, Model):cached()
 local function move(dt: number)
-	for _, transform, model in moving_models:iter() do
+	for _, transform, model in moving_models do
 		local cf = transform.new
 		if cf ~= transform.old then
 			local part = model.PrimaryPart :: BasePart

demo/src/StarterPlayer/StarterPlayerScripts/systems/test.luau

@@ -34,7 +34,7 @@ end
 
 local q = world:query(A, B, C, D):cached()
 local function cached() 
-    for _ in q:iter() do 
+    for _ in q do 
     end
 end