So... Why everybody complains so much about Wii U's hard drive and not the PS4 one?

[Intrinsic]

First you compare 32GB to 500GB.

Then you seem oblivious to why its necessary to install all games on the HDD. Think of this, WiiU games come on DVD type discs. Max capacity of 9.5GB. what that tells you is that a level in any WiiU game is probably no bigger than 2GB of assets that needs to be in system RAM at any one time. now imagine you needed to move as much as 5GB of assets from the disc to RAM to load up a level. and that you were doing that all from a disc as opposed to from a HDD which has average speeds that are over 4 times faster than a disc.

And then you somehow suggest that you need to "open your console" to change the HDD in the PS4, I wouldn't call sliding off something that's adequately called "the HDD faceplate" opening the console, just go look at what you need to do to change the HDD in an XB1. That's opening a console

The PS4 supporting external HDDs isn't a priority cause its the only console of the 3 that has instructions on how to change the HDD in the manual and that so doing doesn't void your warranty.

And lastly, you have options, if you don't want to go through the trouble of practicing a little data management, then you can spend $69 on a 2TB HDD and another 10 mins installing it into your console. its not a big deal.