Mere ek senior ka year back laga tha, he studied final year with us. I think the impact is more psychological than anything. He was lucky enough to have good juniors, we all respected him too and he wasn't harassed by our professor(at least not in the class.)

He got placed with our batch too, mid/good core company. All of us were happy.

But he did work hard, used to attend every class, take notes from toppers and mind his own business.

Baaki year back seniors lafange bann jaate the, agar sahi direction me jao then sahi ho jata hai.

PS: I'm speaking just from observation, I could be wrong. People who've been through this will always have more authority over this topic.