Many fear change, especially when content, but embracing it can fast-track career growth. I learned this when I got "borrowed" by another team for a year.
Your changes now impact hundreds of other developers, they are not just limited to you and your team. You need to collaborate with people, most of whom are in a different country. You can’t just do everything your way. You depend on more departments and teams than you even knew existed.
Feeling the impostor syndrome when you start out. Being at ease with your daily tasks with occasional lapses into overconfidence. And just as you reach the peak, stagnation and thinking about the next steps.