If you're talking about recurves, the relationship between the length of the bow and the shooter's draw length is important. It is important that the recurved limbs be short enough to open up at full draw, in order to store energy that is released when the bow is shot. Of course, the limit to that is when the bow begins to stack, but stacking is noticeable enough that people will avoid it without being told.
For me, for example, with a 27 1/2” draw, I get better performance out of a 62” recurve than a 64” recurve. If I were solely a target archer, I might be willing to forgo the performance advantages of a 62”recurve for the smoother draw and better release of a 64”, or even longer, recurve. But as a hunter and 3D shooter at unmarked distances, having a flatter trajectory is more important than a few inches better accuracy at 50 yards marked distance, so I choose a 62” bow, which optimizes the power stored in the recurved limbs at my draw length.
Of course, YMMV, and my choice of a 62” length is based on the design characteristics of a BW PSA. A differently designed bow might have a different optimal length for my draw length.