[smaudet]

This may not be universally true, but voice-only makes a difference, too.

Audio is very low bandwidth, but for work it is usually more than adequate. Screenshare, where important, is mostly just a matter of providing small diffs over time, it's usually much cheaper both to encode/decode than normal video streaming. You can also run it point to point in smaller calls, which means fewer hops and datacenters (more routers, perhaps, but you were going to need them anyway)

[adql]

That's a nice excuse for when I want to just do what I want instead of staring at stupid camera just so someone can see me looking at them in the square on their screen.