cynar

Uncompressed 1080 is already approaching the eyes resolution limit, when viewing it in a living room environment. 4K is close to the monitor usage limit.

The reason that 4K seems better is often down to bandwidth and colour depth.

There’s zero benefit to an 8K TV. An 8K monitor might be useful, but is still well into the diminishing returns curve.

There’s still some ground to be made up with colours and frame rates, but resolution is effectively maxed out already.

It depends on the hose and the flow rate. They can vary a lot.

Also, your not just clearing the stagnant water, but also anything that was growing in it.

The observations are direct. LRDs are thought to be either clusters of stars or a black hole. The spin is such that it is incompatible with a cluster of stars.

The maths is non-trivial, so needs to be confirmed by others.

As for the primordial part. Black holes are thought to form 1 of 2 ways. Slow build up, in the core of a galaxy, or crushed together by the pressures just after the big bang. This object has a galaxy too small, and too young, to explain it’s size by slow growth. This implies that the galaxy formed around the hole, not vice versa.

This all seems pretty direct to me.