If proposing a space mission that has to be done in 5 years and must launch in 3-4 years; you may not want to suggest an entirely new spacecraft design.
This is not regarding any particular mission proposal. I've just been listening to a lot of mission plans today.
I will never understand senior colleagues (i.e., full profs) who brag to me about not having taken a vacation in 10+ years. First, that is not impressive, that is sad. Second, that shaming attempt whizzed right past me, honey. Third, there is power in a union. If one group in the academy needs to do better with this type of talk, it's tenured faculty. #SubTweet