Since I started this nonsense with LeBron...
I do think he quit at the end of the Celtics series in 2010. Whether that was due to a certain ride West or not is unclear, but either way I remember watching the end of that series in high school and being amazed that a guy could mail in a game that hard and still drop a 30 point triple double like it was nothing.
How he differs from players like Ben Simmons, PG, AD, or what we are hearing from Zion... he never left when he still had contractual years obligated with his team and never demand that they trade him to a specific team. He played out the years on his deal, tried hard with the exception of 2010, and didn't pull any of this sitting out bullshit. He clearly cares more about his reputation and has a better sense of honor than these other goons.