The sad part about selective forwarding units (SFU) is you loose end-to-end-encryption. So you only have encryption between you and the sfu and sfu to your part

The sad part about selective forwarding units (SFU) is you loose end-to-end-encryption. So you only have encryption between you and the sfu and sfu to your participant. For hosted solutions this means a server could record all your conferences. Therefore i am waiting for the PERC standard. It will allow to send the audio/video to server only once and the server will retransmit to all peers - everything still end-to-end encrpted.