The main reason to consider something different to Jitsi is to directly use Matrix for decentralised e2ee signalling to manage the media streams, and allow hybrid SFU and MCU models (like hangouts or zoom) rather than pure SFU like Jitsi. We do like Jitsi though and already contribute directly and indirectly - Jitsi’s E2EE is derived from Matrix, and the Matrix community just contributed a tonne of a11y fixes to it that just landed. But we’d still like a fully decentralised Matrix-native group call solution eventually.