I totally feel your pain! I hate it when the nighttime stuff gets cancelled. At WDW, the finale' is what it's all about....and they NEVER get cancelled. But at DL, it's like sleeping with a snoring person. You get all uptight and anxious waiting for that next snore/that next cancellation. The worst is when the cancel in the middle of the show. I used to feel the anxiety of the cancellation up until it started. But when they cancelled mid-show on me, now I worry it'll end at nearly every moment of the show. It really kills the magic.
I'm glad you said this, though. My kids and I were watching it while walking to the hotel after our conference ended. They were waiting for the finale and it never came! So sorry you had to experience this up close and personal. It really makes for a crumby end of the day.