Oasis
For some, that could be a novel concept.
There was a period spanning two months, where I did 4 go-arounds.
Two were weather related, and prior to the approach, I briefed and went through what was likely to happen, including both of us practicing the mouth music. Strangely, both of those two were seamless and remarkably unexciting.
Conversely, on one of the other 4 go-arounds in question, a very unexpected one, one of us managed to say the other persons words, which naturally meant the respondent then replied also with the other persons words. Other aspects were missed and whilst it was never unsafe, it was embarrassingly shambolic.
Hence my subsequent predilection for having a practice of the mouth music on subsequent flights where a GA was likely.
As for reduced or zero crew, we all reluctantly know it’s heading that way, but public acceptance, or not, will be the key.