Of course there are many users who decide to use IDE over AHCI and sometimes with good reason. It's just that there are also a lot who want to use AHCI as it is a new technology and therefore must be better. In fact I always say to people unless they are going to get something out of it there is not a lot of point in changing to AHCI as most members don't use HotSwap drives and don't really see any appreciable speed increase over IDE mode.
