Towards the end of the article, I say this: "If you just make the same game, the one you know how to make, the players get bored because it’s nothing but problems they have seen before and already have their answers to. Sometimes, they get so bored that an entire genre dies." -- the last phrase links to a video about how MMOs are dead. :D

That's just like, your opinion man. In my opinion neither of those two claims are universially true.

I thought this was obvious? These are social games where everyone is in the same funnel and the players with the most time dominate others... but also need new objectives. At the beginning you quest with people your level, but they always, always devolve into bigger, more tedious tasks (raids) that have less and less differentiated rewards (1% chance of a drop that boosts you 2%) because otherwise you have players at level 283 and there is no way to balance team dynamics as some people scale infinitely.

Because MMOs are expensive to make and run and the people who can afford to fund that expect a strong return on investment or they will shut it down.

I loved World of Warcraft for many years, but kind of stopped playing during Cataclysm.

And it's kind of weird, but I preferred the old-style questing (many repeated quests and perhaps less streamlined experience) compared to what came afterwards.

In Cataclysm they tried to improve the quest experience, add more variety, but somehow the game lost a bit of its magic - at least from my point of view.