If only there were this magical piece of paper that everyone presented when they applied listing all their relevant skills and experience so that the company can determine if it's worth giving them 2 hours of their time.

All kidding aside, the efficient thing about resumes is that you write them once and use them everywhere. Coding samples are inefficient because you have to take 4h to write one for each company.

Edit: the other problem with takehomes is that it self-selects the people who have scarce-enough opportunities that they find it worth their time to do them.