Amazing things I didn't know about Taiwan after 4 years

I know the MRT (subway system) here is fast, reliable, clean etc.
I know which stops to get off for most of the places I want to go.
I know the station in Dazhi is complete but will NEVER actually be ready to ride.
But I had NO idea that you could put MRT money in your watch!
Apparently Swatch sells an "easy card" watch that you can recharge at local convenience stores.
So for about $50 dollars (an investment?), when going through the MRT gates, you just swipe your watch instead of fumbling for your card, or buying one of those easy-to-lose tokens.
It's freakin' amazing!