1. Project that takes longer has higher chances not to be finished. 2. Feature creep is a thing and it’s a valid concern. In planning you don’t usually do a po

1. Project that takes longer has higher chances not to be finished. 2. Feature creep is a thing and it’s a valid concern. In planning you don’t usually do a potential benefit analysis, you do risk analysis, because additional wins are nice to have, yet you are interested in project success more. So focusing on risk rather than benefits here too makes sense.