Was thinking this morning, I 99.9% of the time, only see a main game loop, looking like this, just as much so where the delta is passed into update():
while running getDeltaTime() ... f(deltatime) ---
Now the question I was thinking to myself was what if between getDeltaTime() and f(deltaTime), the code in the middle took 1 second (large value to be easy). That means f(deltaTime) would have moved whatever object less distance than it was supposed to. This would of course be solved by grabbing the delta time directly before it is used.
Should this be a factor to be concerned with in any case?