Yes, if I thought the content was worth doing for me.

The first time I tried Mhach, it was hard. I wanted to improve so I could get better gear.
I asked more veteran healers for advice. Took their advice and practiced and improved and got my gear.

I wanted to clear Nidhogg extreme with my FC. It was my first unsynced extreme "primal" fight.
Because I wanted to do it with my FC, I had to improve a lot. Eventually we cleared it.

After 3.4, I wanted to become active in raiding. And I wanted better gear. I wanted a challenge.
So I had to improve a lot. I decided to raid as a Ninja. I had to learn my rotations and practiced a lot on wooden dummies.
At the time, clearing Alexander was worth it for me. I enjoy the new gear I have, but I have not cleared A12S and probably won't.


Why? Simple answer. It isn't worth it for me anymore. My thinking has changed. 1 weapon (which will be obsolete soon), a mount (not interested in it), and body armor (ninja's isn't very good).
I could improve to clear it, but it isn't worth the time or energy. Hours and hours of bad parties / unprepared people and buying so much food and potions is not worth a weapon, mount, and achievement.
I also no longer have the patience to deal with people who come to "clear parties" without having enough practice first and get hit by every avoidable damage.

In fact, this week I haven't even finished A11S because yesterday I got in groups with people who have "cleared" it, but still haven't learned the fight at all.
Too many have been carried.

What we need is not only challenging content, but challenging content worth doing.