Honestly the power curve stops at about 1,640-ish on average for most people depending on the starts chosen. Blue and Red constellations stop giving more power and the Green on isn't really all that helpful except maybe in PvP when it comes to the mounted movement speed, out of combat movement speed, etc.
Quite frankly this feels like an unfinished system.
Imagine playing every day for 10 years and finally reaching 3600 cp and... nothing not even an akivement.
Zos should definitly reserve somthing special for cp milestones.
Some more inventory space or even an exclusive epic dialogue with Molag Bal aknowledging your efforts... something.
I'm around 2000 and it would be nice to have 200*3 (2600) CP to have perks filled such that you don't have to reconfigure in the middle of things. At max you'd get another 5-6 perks, which is useful although not often. Addons can swap perks without having to open the UI too
Put it this way I'll take your CP if you don't want it.
We have gone ahead and closed this thread down since it is rather old. Please keep in mind that sometimes it is better to create a new topic, instead of replying in one that was posted a while ago.