Proposal: Culture and life in Japan
The proposal "Culture and life in Japan" was closed during the commitment phase as not viable.
I attempted to promote the proposal to people who hadn't participated in the Stack Exchange network before. If I had successfully promoted it, and those people find out the proposal was closed as not viable, that'd leave them with a bad experience. They might be less likely to participate in Stack Exchange in future.
It might also make them less likely to participate in the definition or commitment stage of modified proposals, such as Japan. Partially because they may think it's advertising for the closed proposal, and partially because they may be discouraged by the previous failure.
Would it be better to check whether a proposal is viable before, rather than during, the commitment phase?
The only potential downside is that the commitment phase allows the management to gauge how much interest there is in the proposal, but I don't think that plays a major role in viability.
Edit - whoops, I just realised that the proposal had hit the 2 year limit. There I was thinking it was closed because it was too broad! However, it entered the commitment phase 2 weeks ago. It'd be extremely unlikely to hit beta in that time-frame, so it should have either been given extra time, or shut down.