In every single expansion, we have slowely moved from World of Warcraft to World of Scalecraft. A game where all content is scaled.
In TBC we got "normal and heroic dungeons". In WotLK we got normal and heroic raids (starting from Ulduar). Cata, 10 man and 25 man choice. Cata, normal vs heroic mode. Cata, LFR. "Flex raiding". "Timewalking dungeons". Now we have even scaleable leveling zones, PvP gear scaling and "unlimited scaling" in dungeons. Gear is also being scaled starting with Heirloom gear and now this whole concept of titanforged and warforged gear. Hell, even spells used to not be scaled before, you had ranks. You are a miner on lvl 1? Don't worry, you can mine the Legion ores, we just scale down how much you get from mining it. Want to kill a mob? We scale the HP and dmg of the mob based on how many attacks it.
Even I am starting to have issues thinking of more things that can be scaled, but I am sure Blizz will come up with something. How about Raiding+? Or maybe scale every single leveling zone all the way back to level 1? Let's not give Blizzard any ideas...
Scaling is LAZY. It is trying to feed us the same content multiple times, with slight changes to HP and DMG, then call it new content. Throw the concept of RPG out the door, we need more scaling! Scaling is, in my opinion the worst mistake this game has done ever. It sucks the life out of this game. It just gets worse and worse, without any indication that it will stop.
I hate every single thing scaling has brought to this game.