Valve works differently than other companies. Internally everyone works on what they want when they want. You can literally wheel your desk to a new location if you decide to want to work with another team. Because of this though it creates an odd dynamic that isn’t always going to work out best for the developers or the consumers.
This is why it feels extremely random whenever valve releases something new. You would think they would just release banger after banger of hot AAA titles. But it’s more complicated than that unfortunately. This is also reflected in things like fixing cheats in team fortress 2 etc etc.