Can people share the positive impacts on their marriages postpartum?

This is my first pregnancy and my fiancé and I are really excited. We’ve been together for seven years and he’s genuinely my best friend and favorite person. Whenever we tell people that I’m pregnant, they always make jokes about how the baby will ruin our relationship and how everything will change. I’m not dumb and I know the dynamic will undoubtedly be different. But I’m hoping some can share POSITIVE stories about their marriages postpartum. I’ve had so many people trauma dump on me how their kids ruined their marriage and it’s been overwhelming to say the least. So I’d love for folks to share the good parts :)