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Comment by JumpCrisscross

> how many companies could actually do this before cascading collisions starts becoming a real worry?

Twenty of them at 100,000 birds each to start approaching the density of planes in the sky [1]. Not around an airport. In all of the sky. Oceans and all.

Practically speaking, this is not a pressing concern for our generation.

[1] https://news.ycombinator.com/item?id=46711405

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