When graphite first came out few wanted to try it.
As a compromise they made graphite racquets with wood in them. A composite.
When Lendl finally had the balls to use one people started to trust them . But I think the very first was Ashe?
Then came the prince oversized . No one wanted to try them at first either and then when pros started using them people started as well.
By the way polyester strings have been around since at least the 70's. But like sheep everyone would only use gut.
Borg ran into the same issue....everyone said "you must hit with a closed stance ....it's the only proper way!!!"
We all should thank Borg for not listening .
At one time even a two handed backhand was revolutionary!
Same old story.