GW230529's black hole is in the range of the hypothesised mass gap. X-ray observations had not found black holes below 5 solar masses, so it was suggested that supernova explosions don't form black holes in this range. This observations suggestions otherwise
Low-mass black holes are less likely to swallow neutron stars whole. Hence, we could be more likely to have a counterpart to neutron star–black hole mergers that telescopes could see!