What is it like to start a big family at 40 years old for man do you think it’s too late?

My husband was 56 when we adopted our oldest boys together. The additional life experience meant he was calmer and more patient as well as being more financially secure. He had also already raised a child. Nothing really phased him and I think he really enjoyed being a dad. There was a 21 year age gap between us. I was 35.