I wanted to try a new airline and ended up being stuck at my destination for 2 extra days because the return flight was cancelled. My only way to judge the new airline before booking the flight was its brand appeal and premium ticket prices. Now we have a way to form a better decision and look at historical data in terms of cancellations and delays. We could even choose to avoid some airports that have significant departure delays.
Would be nice to add the data as percentages of total. The current sorting doesn't take this in account, and the cancellation as percentage of total flights would give a totally different order.