Velocity of LoC isn't important. Velocity of user visible improvements can matter if a project feeds off of usage and popularity. Or at least that velocity matters until the OS is capable enough to satisfy the user base.
For example, I'm a big fan of DOSBox. And while the core project still has some code check-in's from time to time, its last release was 7ya. Now I use and follow forks because they're consistently releasing useful features and fixes.