Counter-counterpoint would be, Apple becomes a customer of the API, and then someone else (Google, Facebook, whoever) buys Dark Sky and Apple has to scramble.
I'm bitter too, I build my own local/remote weather station at home (several Raspberry Pi's, an Arduino with a custom shield, and 15k lines of Python), which uses Dark Sky's API as one of its data sources. This means I have a year or so to find a new data source and rewrite a bunch of code (and no source is going to give me exactly the same data from the same sensors, so my 3-4 years of historical data is going to have a definite before/after cutoff in it).
But sure, at that point, it probably makes sense for Apple to just buy the company to make sure that the data supply chain is within their control.
I am just a little bitter to lose the service personally.