I think there is a lot of speculation on what might happen to your luggage in this thread vs people who have actually had those things happen.
One of my favorite memorable quotes I've heard in life was during one of the MULTIPLE times that my bag was lost.
1) If you decide to check a bag (not a bad idea), make sure you still have 2 undies and 2 pairs of socks in your carry on so you can survive for 2 more days if your checked bag gets lost.
2) Story time!
Mid 2014 I'm flying to Louisville, KY from Lyon, France.
As I landed, I make my way to the carousel and after 30mn of sad looking out for my checked bag, I realize the damn thing isn't here.
Problem: It's 1.30am here. Nobody is around.
I make my way around the airport (not too big thankfully) and ask around until finally I'm pointed to a random counter.
There is nobody there but I can see a door cracked open with some light coming out of an office.
So I jump behind the counter, and proceed down the corridor.
Get there, knock on the door and peek inside.
Reclined on a chair, feet on the desk, is the most flamboyant gay guy I've ever seen. Pink hair, eyeliner, nail polish, the works.
He notices me, smiles and asks what's my business.
I'm not prejudiced and really need my fucking bad so I open the door and explain my problem.
Guy listens, promptly straightens up (lol) and taps on the desk and tell me to give him my passport, flight ticket and the baggage receipt.
I do so.
He starts typing on his computer...
I'm waiting.
Types some more...
I'm waiting.
Then he laughs. And proceeds to explain : "It seems like your bag made it to the tarmac during your layover in Paris, then half-way through loading, the ground crew went on strike and didn't load like half the plane"
I chuckle, cause I'm used to shit like this...
Then he goes: "ahhhhh the French... beautiful people... beautiful language... but the organization... ahhhhh... sometimes, you know.... you'd wish the Germans would have stayed!"
All this while holding my French passport.
Anyway, I got my bag 24h later and they delivered it to my residence at 9.something pm.
Fucking Delta...