When I first started dating my current bf, he brought out Kingdom Builder. We played, it was fun, he got excited that he found a game I enjoyed. Excited enough that he went ahead and bought the rest of the expansions.

Next time we got together to play games, I got REALLY confused and struggled because the rules changed. A big lesson was learned in that moment lol. I struggled overall for a while because everytime we played a game and I felt like I was just starting to get it, some aspect of the game would change and I felt like I was starting over again. In time we've found some compromises that work for us though. Legacy games FTW!