Personally, id say the hardest part is customer adoption, rather than the technical implementation. I can build or integrate an AI feature successfully and still have it fail if users don’t understand when to use it or don’t trust the results. I’ve also noticed that adding AI can sometimes create a second workflow instead of improving the existing one. For me, the biggest test would be whether the AI actually makes the product feel simpler. If users need training, extra clicks, or constant correction, then the feature probably isn’t solving the right problem.