id put $100 say no one on this forumn has one over 5 yrs old.....
ive had many including an adult i had for 2 1/2 yrs old, it ate fine was the most active fish in my tank.
it also didnt clean fish, never really did, cleaned my hand though all the time:P
most died for no apparent reason , didnt look sick or skinny, wasnt getting chased bullied or stressed...
ive been reefing for awhile and in a few different provinces and i dont think i know of anyone who has one older than 5yrs
im not against getting another as they are nice fish and its not impossible to keep them short term but i will wait a while to see what the hobby comes up with for them.....
after all patience is what its all about