Such a result would show that we're in a simulation built with technology and scientific understanding not entirely different from our own -- that whoever model

Such a result would show that we're in a simulation built with technology and scientific understanding not entirely different from our own -- that whoever modeled us modeled us after themselves. But the lack of such a finding wouldn't necessarily disprove a simulation. It's possible we're in a very simplified model of the real universe, and that the simulators --whoever or whatever they are -- inhabit a universe of very different physics and phenomena. Broadly and metaphorically speaking, we're trying to probe for the glass walls at the edge of the fish tank. But what if it's not a fish tank?