Austin's point, and I agree, is that we shouldn't optimize the system for those contributions. Cleanup, documentation and other small patches are very much welcomed, and they usually get merged within a few days. To make a truly better GHC though, we very much depend on expert contributors, say to implement and review Backpack or DWARF-based backtraces. My point is that `arc` is hurting these expert contributors as much, if not more than everyone else. To get more expert contributors you need more newcomers, but don't optimize the system only for the newcomers.