> It's phenomenally hard. Echos, indirect routing (bouncing off buildings), sound waves changing speed as they go through various materials (like a lens). It's

> It's phenomenally hard. Echos, indirect routing (bouncing off buildings), sound waves changing speed as they go through various materials (like a lens). It's a very hard problem. I doubt they've solved (or even have non trivial mitigations for) any of those subproblems, based on stories of how often they apply human "corrections". The portion they've implemented may be very easy to replicate.