I may be wrong about this, but IDE is a common technology to PATA and SATA drives, merely referring to the controller on the drive itself. PATA and SATA refer to the interface used to connect the drive to the motherboard.
Shouldn't the article say they are discontinuing PATA, not IDE?
Many motherboards nowadays only have 1 IDE slot anyways, with many more SATA slots, so considering the motherboard makers are phasing out IDE too, not surprising. Besides, I'm sure there's more than enough IDE drives sitting in warehouses, in store stocks, etc to last a few years.