Comment by oofbey

For the analogy to fiber & DWDM to hold, we'd need some algorithmic breakthrough that makes current GPUs much faster / more efficient at running AI models. Something that makes the existing investment in hardware unneeded, even though the projected demand is real and continues to grow. IMNSHO that's not going to happen here. The foreseeable efficiency innovations are generally around reduced precision, which almost always require newer hardware to take advantage of. Impossible to rule out brilliant innovation, but I doubt it will happen like that.

And of course we might see an economic bubble burst for other reasons. That's possible again even if the demand continues to go up.