Except for that this kind of reduction to the primitive stuff only happened to the WiiU, both the 3DS and PS4, not to mention the Vita (or more or less PSP aka ePSP) are still getting their fair attention and brewing.
There has been a steady change in diversity, tho on each and every plattform of every generation, the Commodore was FULL of brew, the NES had close to none back in the day, the SNES is STILL getting some, the N64 had and has none at all afaik, the Gamecube had some, the Wii EXPLODED from it and the WiiU seems to suffer from the fact that it has vWii more then it gains because everyone sees it as a reason that actual native homebrew isn't worth it even tho there is incredible potential, even the more with unity4wiiu. I could continue with Sony and their back and forth but it was similar.