The principal of optimal slack tells you that if your training will take N months on current computing hardware that you should go spend Y months at the beach before buying the computer, and you will complete your task in better than N-Y months thanks to improvements in computing power.

Of course, instead of the beach one could spend those Y months improving the algorithms... but it's never wise to bid against yourself if you don't have to.

A colloquially is that to maximize your beach time you should work on the biggest N possible, neatly explaining the popularity of AI startups.