Is this irrational from the POV of an individual? Learning a complex tool is quite an effort. In the same time one could develop one's own tool that's likely mo

Is this irrational from the POV of an individual? Learning a complex tool is quite an effort. In the same time one could develop one's own tool that's likely more fine-tuned to the tasks at hand. Moreover, if one's tool acquires outside users it's highly CV-worthy.