Composer 2 is an effective solution for increasing productivity when working with Drupal. Everyone knows the situation when simple operations take a lot of time. Using Composer in Drupal makes developers' lives easier.
To speed up workflows, web developers often use the same code many times in many projects. This code can be written not only by other people; that's not the point. Regarding programming, rewriting code is a concern for many developers. Composer allows you to get rid of this problem. You can save parts of PHP code and use them for other projects.
Nowadays, the stakes are getting higher and higher. Speed is of the essence for an ordinary user, and each web page and developer has to comply with it. This is where Drupal's BigPipe module takes the stage.