They’re all subsets of AI. I think Deep Learning has been the “cool” and popular one for many, many years. Since the “Attention is All You Need revolution”, there’s been an apparent need to differentiate. Transformers are DL, but they work much better than the now classic CNNs, RNNs, etc. Transformers is probably too overwhelming a term to be the popular label, so AI/ML it is.
Discussion
Most don’t even know the difference between ML/DL, even less that one is a subset of another. Still seems adding AI/ML leaves out DL. Why not just call it ‘AI’ since that encompasses everything anyway? AI/ML if their discipline is ML I get it, but for general marketing?.. morning rathole