Discord lights up the avatar's outline when they speak, which is fantastic by itself, but combined with push to talk it's perfect as you can convey the exact in

Discord lights up the avatar's outline when they speak, which is fantastic by itself, but combined with push to talk it's perfect as you can convey the exact intention of taking over the conversation and solve it much more quickly when there's overlap than any 'raise hand' mechanism I've used. Those tend to just not work as raised hands get more ignored than just talking.