It's worth noting that there is a limit to how fast black holes can grow [1] so ultra-massive black holes like this tell a story, namely: 1. It starts placing

It's worth noting that there is a limit to how fast black holes can grow [1] so ultra-massive black holes like this tell a story, namely: 1. It starts placing limits on how young the black hole can be. IIRC black holes like this must've been formed very early in the Universe, which may be earlier than our models otherwise predict, suggest or even say is "possible"; and 2. It is theorized (again, IIRC) that a lot of ultra-massive black holes such as those at the center of many if not most galaxies can only really form by the merger of black holes due to the above limits. These must be unbelievably energetic events. It's possible that such events may actually star formation in nearby nebulae. [1]: https://physics.stackexchange.com/questions/167250/is-there-a-limit-as-to-how-fast-a-black-hole-can-grow https://physics.stackexchange.com/questions/167250/is-there-...