Now a days DL models are becoming commodities very fast. By the time you train NN to solve a particular problem, a new efficient model is out somewhere and is a

Now a days DL models are becoming commodities very fast. By the time you train NN to solve a particular problem, a new efficient model is out somewhere and is available public. So you need to go through the process entirely or else you risk losing business. Unless your NN is so unique like you are handcrafting your own in which case you take lot of time to arrive at a best model and you need more PhDs.