Can someone explain to me the key differences between PF motors and EV3 ones? I understand that EV3 motors are 'regulated', presumably meaning that you can control their rotational speed depending on the wheels attached and so on, but apart from that, is there any reason to use PF motors instead (e.g., XL ones)?
One reason why this question comes up is I saw lots of non-EV3 motors used with EV3s in a recent robotics competition I went to. Also, large wheels which you apparently cannot buy anymore (not from Lego, anyway).