Also, for phone calls and conferencing, wired headsets have neglible latency, compared to bluetooth, which is likely at least 100ms. In itself, this isn't terrible, but add the other latencies in (e.g. wifi, inter-city network). Our brains do a great job of compensating, but I'm starting to think that this compensating comes at a cost (headaches, tiredness), especially if you're on conferences all day as many are in remote work.