I just found out that energy between turns is preserved in Spirit Island.....When have you unexpectedly learned a rule that completely changed the game?

I had just about given up on Spirit Island. Doing anything on my turn was a huge puzzle of balancing energy use vs. the cards I had available. Figure I'd give it one more shot on TTS just to see if it was the physical board game that I was put off by...only to see that the automation kept my energy between turns...Uh...Is this bugged?

Nope! I keep generated energy between turns! All of a sudden there's so many more things I can do on my turns!!! This has changed everything. 10+ games and I had no idea. I've been playing a notoriously difficult game on hard mode this whole time. Time to give this a second second chance.

Have you had anything like this?