Product teams complain that they don't understand the big picture—they don't see how their work contributes to the larger goals, and they're struggling with what it means to be an empowered, autonomous team.
customers just aren't as excited about this idea as we are. So, they choose not to use it. Sometimes they want to use it and they try it out, but the product is so complicated that it's simply more trouble than it's worth, so users again choose not to use it.
at least half the ideas on your roadmap are not going to deliver what you hope. (By the way, the really good teams assume that at least three quarters of the ideas won't perform like they hope.)