Jellyfin: The Free Software Media System

He forgot some of the biggest reasons.

• A larger codebase is generally just harder to work on. A more established product with more users tends to be larger.
• More popular projects with many users tend to have developers that don't welcome new contributions. The investment required for a new developer to make an initial contribution is huge. Things like setting up the development environment and the stack of technologies and understanding the basic architecture are significant barriers to entry. Existing developers tend to not care about reducing that burden. After all, everyone who's *actually *contributing to the project is already over that barrier, right?

Developers, open source or otherwise, should generally be excited about people "taking their jobs". Because you're going to have churn of developers over time, and if you're not bringing in fresh blood, then your project is eventually going to die. Do you really want to maintain every project you work on for the rest of your life? Encourage new blood. Do what you can to accept new ideas and directions unless you have very good and explicit reasons not to. If someone has a sightly different vision and is willing to hop that initial barrier and is willing to put in more work than you, don't undervalue that. Be willing to compromise a little to bring in a new developer. Sometimes you have to say no, but consider that you're saying no to a person who wants to volunteer their time to do work for you.

On the other hand, there are tons of people who say they're eager to work on your project. You invest a little time into them, they provide nothing, and then vanish. It's easy to get jaded when you keep running into people who are more words than action. Be very careful what you promise you'll do, and if someone invests their time to help you, try to actually do what you said you would.