Intermediate-mass BH candidates are rare, so it's great to spot the first in the Milky Way. It's also interesting because there are much larger supermassive BH

Intermediate-mass BH candidates are rare, so it's great to spot the first in the Milky Way. It's also interesting because there are much larger supermassive BH candidates in other spiral galaxies than we have with Sagittarius A*, and lots of room to speculate about why. For example, maybe there are lots of IMBHs in the neighbourhood of our galactic centre, but they simply haven't merged yet.