In regards to the argument about "plug and play", of course it's all relative. PS1 is more "plug and play" than PS4, but PS4 is more "plug and play" than PC. Sure, you have to download patches, updates, and firmware updates on PS4, but those are all automated. You literally just have to push "X" to select "Ok" and it holds your hand.
On pc, Steam has been very helpful in making the process easier, but you would be surprised how many people still get intimidated by driver updates, manual patches, and fixing issues that are specific to their hardware.
As a recent example, a friend of mine wanted to play Bioshock on his Windows 10 machine, and he couldn't figure out why he didn't have sound. We had to search for a good while to find a working solution. Sometimes you won't find a solution at all and get frustrated.
You also have to worry about adjusting graphics settings on pc. There are tons of people that don't like "tinkering" with settings, and they don't care researching what aliasing, v-sync, and post-processing means. That type of audience prefers to just launch a pre-optimized game and go, which to them fits the definition of "plug and play".