Better algorithms is one of the things I meant by "better ways to tweak the models to make better use of the available training data". But that produces slower

Better algorithms is one of the things I meant by "better ways to tweak the models to make better use of the available training data". But that produces slower growth than the jaw-droppingly rapid growth you can get by slurping pretty much the whole Internet. That produced the sharp part of the S curve, but that part is behind us now, which is why I assert we're approaching the slower-growth part at the top of the curve.