Alkien, i never quit forever 😀
The biggest issue for me is, there is nothing you can do when you reach lvl 75. No more skills, no more nothing.
Since there is no goal in high lvl (when you already did anakim/lilith/Baium 100 times), you are bored to create new chars over and over again.
All in all i am optimistic that some day we will have something above 75 😉