I’m not particularly interested in training models, but it would be nice to have eGPUs again. When Apple Silicon came out, support for them dried up. I sold my old BlackMagic eGPU.
That said, the need for them also faded. The new chips have performance every bit as good as the eGPU-enhanced Intel chips.
eGPU with an Apple accelerator with a bunch or RAM and GPU cores could be really interesting honestly. I’m pretty sure they are capable of designing something very competitive especially in terms of performance per watt.