Software and computer systems are becoming worse and worse.
@Jonathan_Blow explains why: https://www.youtube.com/watch?v=pW-SOdj4Kkk …
TL;DW: complexity.
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My understanding is you need a very powerful laser and a good detector. The beam diffuses a lot, and most of it gets absorbed by the atmosphere. If I remember correctly, a 1 MW laser will get you ~7 photons/sec back. Not something most people have the tools to do, but possible.
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