Even before this discovery, it&#x27;s been pretty solidly established that any alternative theory to General Relativity would need to behave essentially identically to GR in the limits where we&#x27;ve been able to test it. So, for example, the &quot;low energy limit&quot; of string theory is general relativity (plus other content, in most cases). I&#x27;m not sure whether the loop quantum gravity folks have a working low-curvature limit yet (I&#x27;m out of touch), but that would be a requirement for them, too.<p>At first glance, I&#x27;d guess that this discovery only strengthens that conclusion: even a small deviation from GR might well change the detailed behavior of an immensely high curvature situation like a black hole merger, and what we saw seems to have been a spot on match for the GR-based models.