If starlink thinks it may have 40,000 satellites at full capacity[1] .. and we expect at least 1 if not 2 competitors..

With a 5-year lifespan for an LEO sat, that's potentially 120,000 deorbits every 5 years...

That will add up quickly... I don't know the science of aluminum oxide increase to ozone depletion.. but this can certainly warrants more research and consideration

1: https://starwalk.space/en/news/spacex-starlink-satellites-ni...