Does it pains you, thinking about how even if you live until 1000 year old with a billion dollar fortune, you still wouldn't be able to recapture specific feelings in specific moments in times? I miss the way I dream and feel the wind sometime, it was a good time.
Spoiler warning: no.
The reason why it failed is because just like the taoism cutivation, it is too restrictive with the levels already fixed and no wiggle room for odd things like D&D's multiclassing.