Does anyone know how the 10,000 Starlink satellites and the other 30,000 LEO competitors by the end of the decade are going to affect spotting near-earth objects?

I would have a hard time believing "not at all".

Vaguely related this is my favorite amateur astronomer spotting accident ever, capturing supernova an hour before it happened which hasn't been done before:

https://www.popsci.com/amateur-astronomer-photographs-birth-...

makes me wonder when the sky becomes so difficult to see through if we are going to lose all that enthusiastic effort