Too Long; Didn't Read
We’ve heard of deepfakes, we’ve heard of NeRFs, and we’ve seen these kinds of applications allowing you to recreate someone’s face and pretty much make him say whatever you want.
What you might not know is how inefficient those methods are and how much computing and time they require. Plus, we only see the best results. Keep in mind that what we see online is the results associated with the faces we could find most examples of, so basically, internet personalities and the models producing those results are trained using lots of computing, meaning expensive resources like many graphics cards. Still, the results are really impressive and only getting better.