They’re both useful, a cricle’s circumference as τr is lovely but πr2 is certainly more elegant for area. The real pity is that they didn’t use the symbols the other way round - if τ = 3.1… and π =6.2… you have a natural π =τ+τ which makes sense (visually, conventionally mathematically it’s nonsense!)
idk man, i acknowledge 2π comes up a lot, but sometimes you just have π and I’d much rather write 2π than τ/2
They’re both useful, a cricle’s circumference as τr is lovely but πr2 is certainly more elegant for area. The real pity is that they didn’t use the symbols the other way round - if τ = 3.1… and π =6.2… you have a natural π =τ+τ which makes sense (visually, conventionally mathematically it’s nonsense!)