What year is consider the golden year for 3rd gen

2018

Yeah 2018 probably

2014, specially if you're a Blackjack

2017

we got; Really Really, AIIYL, Spring Day, Red Flavor and many more bops

From what my friend told its 2018, but that's from her perspective.

We can only say when 3rd gen reach its end. Right now 3rd gen groups are still dominant (BTS, BP, Twice, Seventeen, Exo (their solos), NCT) so we can’t really tell now

Maybe 2016? Cheer up took over sk, gave them a new NGG and was being used in presidential campaigns soon after. Bts's blood, sweat and tears released and started a whole new hallyu wave, Exo released monster a solid bop and a half, Bp's debut was huge. Lotsa things happening at once. An iconic year.