I have 2 labs. They are indeed crazy when they’re young - like my 2 year old Chocolate Lab. They calm down a lot. My 9 year old Black Lab is still playful but the manic energy he once had (and the chewing/destructiveness) is gone.
Labs are the greatest.
My Lucy was my first lab. Sweetest dog I’ve ever owned. But she had full on Lab lunacy when she was a puppy. I asked a friend when she would calm down. He said “Maybe when she’s 2. Maybe never.” She calmed down when she was 7. Ran the hell out of her every day to get the excess energy out. Her vet described her as an “athlete”. Clean living and hard exercise got her just past the 14 year mark. Best girl ever. I miss her every day