I've been thinking about this a lot, too! Honestly, I think the most challenging factor is that when you are working on machine learning for your game.... you

I've been thinking about this a lot, too! Honestly, I think the most challenging factor is that when you are working on machine learning for your game.... you aren't really working on your game. i.e., you're not writing storylines, creating visuals, audio, programming general interaction, etc. Machine learning (if you don't have a ton of experience) can be super time consuming and unless your game is 100% based around the sole idea that it is ML.. all of that time is taken away from the rest of your game.