edit: found it. they use a SFU forwarder. That's the cheap version of going full centralization (MCU) benefits. they probably have a better deal on bandwidth than CPU to justify that, or all their use cases work fine with only one person transmitting at once, which gives you the same benefit of a MCU with less cpu usage...
> link describe a P2P WebRTC implementation
what am i missing?
edit: found it. they use a SFU forwarder. That's the cheap version of going full centralization (MCU) benefits. they probably have a better deal on bandwidth than CPU to justify that, or all their use cases work fine with only one person transmitting at once, which gives you the same benefit of a MCU with less cpu usage...