I actally think the steroids have been an important part in his development. A lot of his play, imo, is based on strength and balance which is heavily influenced by any steroids you might take.
His metabolism will have been running at 3 or 4 times the speed during that period so, internally, he's probably closer to a 29 or 30 year old. I don't think he'll fall of the cliff but I reckon in a couple of years he'll be very much an aged force.
Which would be a shame since I want to see us beating them while he's playing well so there's no excuses.