Played a two player game today and over the course of the game, my opponent racked up 7 of the ten development cards and equipped all of them. Needless to say, his airship became quite powerful at that point. We allowed it for that current game, but I wanted to get a rules clarification for future games.
Great game BTW.
That is allowed, though the scenario is very uncommon. Give that deck a good shuffle. =)