I get the sensibility of that advice but isn't that the case no matter when you buy it? I mean, they announced a nice iPhone Pro, optimized over multiple generations, and then immediately made it look primitive with the Duo. :)
what products _did_ have big leaps from v1 to v2?
MacBook Air -> MacBook Air 2: unibody aluminum construction replaced plastic, ssd option introduced.
iPad -> iPad 2: cut thickness and weight by 30 %. A4 -> A5 doubled performance. Dramatically better screen. Introduced the magnetic case ecosystem.
iBook G3 -> G3 dual usb: from colorful clamshell/toilet seat design to sleek laptop. 30 % lighter, half the volume, twice as durable, 2-3x the performance.
And… Apple I -> Apple II? Apple I was a motherboard, the II was a complete computer.