2015 was Chen Long's golden year when he captured like 9/10 titles, including the world championships.
You're right about Chen Long's performance in 2016, so-so and then all of a sudden he was sweeping all before him at the Rio'16 Olympics, unstoppable in all departments of the game, except when Son Wan Ho unexpectedly took one set off him but then busted again the next.
That year, 2016 OG, even LCW who was the favourite was forlorn in defeat to CL in the final and conceded his opponent was just too good.
Maybe if CL doesn't play till 2024 Olympics he'll win another medal somehow
