Well, okay, I will of course concede that there were personal computers before the Apple II (although at the time it came out, the Apple I was probably the closest thing to a working computer, as opposed to a kit that you could use to build a working computer, that you could get)
But Popular Electronics readers or not, I still think it's accurate to say that "the market" for PC's did not exist before Apple. The post I was replying to was arguing about whether Apple or Microsoft was more like Henry Ford. I think it's also fair to say that the market for cars in the US did not exist before the Model-T, despite the fact that there were several cars sold before it, all of which were unreliable, extraordinarily expensive, and used only by hobbyists - just like pre-Apple I (and to a lesser extent pre-Apple II) computers.
But Popular Electronics readers or not, I still think it's accurate to say that "the market" for PC's did not exist before Apple. The post I was replying to was arguing about whether Apple or Microsoft was more like Henry Ford. I think it's also fair to say that the market for cars in the US did not exist before the Model-T, despite the fact that there were several cars sold before it, all of which were unreliable, extraordinarily expensive, and used only by hobbyists - just like pre-Apple I (and to a lesser extent pre-Apple II) computers.