so I believe using testnet as a model for how things will unfold on mainnet is far from accurate.
Through my experience... Testnet is a KILLER forecast for what is to come to Mainnet.
I've seen it over and over. I saw this OP_Return literally coming in Testnet... Testnet is the best indicator of what is to come if you are paying attention.
Blew my mind as well, all of Testnet has blow my mind, it's hella interesting.