I've seen some people complaining about how it lacks soul or low quality or whatever, but eventually it'll get harder and harder for people to tell it apart from hand drawn. I think part of it stems from some internal fear about the differences humans and machines. I think to them, the process of creation is part of what defines us as living, thinking, human creatures. There's probably also the fear of loss of something we've deeply appreciated for hundreds/thousands of years. As AI becomes more normalized and integrated in society, fewer and fewer people may choose to pursue learning art. In the future, it's possible that all the creative mediums we see are created by AI.
Arknights is super fun and I think is probably one of the best when it comes to strategic gameplay. People enjoy it so much, they will do themed clears like defenders only, felines only, etc just to limit themselves and add the extra challenge of clearing the stages. It's a single player experience (except for borrowing) so there's no competition ie you can play at your own pace. The game has fairly generous systems when it comes to the gacha, my favorite is that you can redeem older operators when they're on banner with something called yellow certificates without needing to gacha.