Is it weird to live at home when you’re 24?

Nope. You are being wise.

Your very lucky to have a fine relationship with parents at 24. I always thought it was weird to live with parents being a young man when I was your age. I lived with girls or roommates when I was in my 20's that had their own houses or apartments. Today, I've always been able to tell a difference in males that lived at home past 20 vs. ones that went on their own before. It usually has something to do with character and personality development. If you don't mind being a little behind your pears in these areas than stay at home.

I think you need new friends. Tell them to mind their own business and do whatever makes you happy. You don't have to accept any judgement about your living situation from anyone else. Period. 

You are an adult, so your friends opinions shouldn't matter to you, they are behaving like 13yr olds, so very childish........ this is YOUR choice and that of your parents, not childish/immature 'friends'

If you have to ask, yes.

When I grew up, in the 70's it would have been weird. I think it's more normal today.

I lived at home until 30. HUGE financial head start. Which is why I did it. Nobody told me it was childish but if they did I would have just mentioned how much I was saving compared to rent.  And its not like I had a curfew.

I dare say if I would have moved out at 23, I might not have been able to retire at 39.

No, it's fairly common, and normal

It's normal for most places and times. The USA has a strong culture of independence and wasting money.

By living with parents you will lack privacy to  bring a romantic partner home, smoke weed, or other things you don't want your parents to see. That's your tradeoff for saving money, and eventually you might feel the need to get out.

As an adult, you should contribute to the household expenses such as utility bills and do your share of cooking and cleaning. If your presence is preventing your parents from moving into a cheaper home, you should pay rent.

I think you'll feel bad about your friends' shortsightedness, about thirty years from now.