What's a Good Opener Anyway?

I do these online consultancy calls with corporate magicians. I love the variety; every performer brings with them their own sensibility and a totally different market. Each one ends up with their own bespoke acts and shows.

Some conversations do get repeated. One that I end up having most often concerns the idea of the perfect opening trick.

It seems odd to say this, but why is there not a trick that is universally accepted to be the perfect opener for magicians? We're all in agreement about which tricks are great closers, it seems, but openers – the answer is less clear.