> Nobody cares how long it takes to train a model.

LOTS of people care how long it takes to train a model. A few minutes, vs. a day, vs. a week, vs. a month? Yea, that matters.

Think about how long it takes to try out different hyperparameters or make other adjustments while conducting research...

If you're Google maybe you don't care as much because you can fire off a hundred different jobs at once, but if you're a resource-limited mere mortal, yea, that wait time adds up.