One could argue that Archie's development into a seriously competetent professional qualifies. When Carter tells him to "set the tone" as he departs in Season 11 (similar to how Greene told him to do so), Morris is confused by the sentiment, leading Carter to shake his head and reply, "Never mind", as if to retract on his passing the torch, demonstrating the immaturity of Archie's character at this point. However, after getting taken hostage in Season 14 and seeing his taker (who he had bonded with over the course of the episode) get shot dead by a sniper, Morris makes an attempt to ground himself in reality. The death of his best friend, Greg Pratt, further forces him to confront life's harsh realities, and by the end, he's become one of the most competent doctors in the ER (and maintained a steady relationship with his police officer girlfriend). When Carter makes is return in Season 15, he's quick to notice the shift in personality:
Carter: Looks like you followed my advice, Morris.
Morris: How's that?
- Made all the better by Archie's faint smile, indicating that he recognizes the significance of the allusion.
- Abby lampshades the growth, as well.
Abby: If I were in trouble, Archie, I would call for you. I would. I would trust you with anything. (Beat) And I didn't always feel that way, but I do now.