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while they don't have the fuel to deorbit themselves, they will eventually deorbit due to orbital decay.

Still, as you said, they won't fall straight down, and would probably burn up in the atmosphere regardless.

In the case of satellites in GEO that "eventually" is on the order of millions of years. For LEO it's a lot shorter obviously.

that's actually a good point, I didn't know orbital decay was so slow