For example, they say that it is difficult for electrons to bend at right angles when moving in the leads, but they also don’t think about it, all the vias on the circuit board are perpendicular to the leads. There are also some reasons that are more reliable, such as reducing lead length by 45° corners, and all right-angle corner wiring requires chamfering. It is also said that right-angle turns will cause acid etching traps in the acid etching solution of the circuit board, but this problem is not present in the widely used alkaline circuit board etching solution. Unless your circuit board works at high frequencies above 50GHz (involving millimeter wave radar/5G communication) circuits, you don’t need to worry about the leads turning at right angles.