Go back 50 years ago and even most US Baptist churches wouldn’t recognize the contemporary version of it.

I'd strongly disagree. The 70s era Evangelical movement has enormous amounts in common with the modern movement. Largely as a result of Televangelism and the political entanglement between conservative politicians and the church.

The Billy Graham Crusade would fit in just fine in the modern American church

Go back 100 and you'll find more space. But then you're seeing all sorts of differences socio-economically.