You're forgetting that some equations have π/2 so on balance nothing will change. It will be the same number of symbols.

I don't think it's just the sheer number of symbols. It's also the fact that the symbol τ means "turn". So you can say "quarter-turn" instead of π/2.

I'm not sure why that point gets lost in these discussions. And personally, I think of the set of fundamental mathematical objects as having a unique and objective definition. So, I get weirdly bothered by the offset in the Gamma function.