I’m generally riding on my own so what other people ride is not really a factor.
The overbiked notion is an interesting one. I quite often feel underconfidenced on a bike and have to work hard to overcome that. Having a bigger bike lessens that, so being overbiked cancels out being underconfidenced. In recent times I’ve risen a hardtail and a 150mm full sus. I found the hardtail intense and exhilarating, mostly in a good way but sometimes not. I like a little adrenaline, but not too much.
The full sus lessened that intensity so perhaps wasn’t as enjoyable as the hardtail in terms of the pure thrill of riding. However it instead offered more of a slow burn enjoyment and opened up new riding lines to me and was less punishing of mistakes, and on the body. So I’m actually OK with being overbiked – being underbiked would be much more alarming. I’m more worried about whether something like the giga would be horrible to ride for long miles on the flat.