I'm also British, and I found this very exciting. I'm deeply involved in the study and development of FOSS and open culture licensing, and the improvement from CC-BY-SA-3.0 to CC-BY-SA-4.0 can't be overstated.

Roller coaster ride? That's not exciting; that's frightening! I can kind of understand 'getting close to the end of a game with the realization that you might win', but this is more frequently nerve-racking for me.

It's not exclusively an Americanism to be excited about law.