It depends. Being able to do the entire stack yourself saves the communication overhead of working with a group of people.

But on the other hand, for the good of the company, it’s often good to sub optimize the individual for the good of the team. You usually don’t want only one person knowing the entire feature and while you will lose out on individual productivity, you can get features out sooner if you have more people working on it.

On a personal level, I love having not to wait on other departments/props to get my work done especially in a dev environment.