A related thought might be, once this is in place, how much work would it be so support Appkit (OS X) apps as well?
Now the tables are turned, and Microsoft is building an "iOS Yellow Box" of their own.
Will be interesting see how they implemented it and whether they used Apportable's Foundation (which looks really well written).
Swift was obviously half-baked when it came out. It's still far from production quality IMHO. But as a deterrent for this kind of compatibility action, Swift's existence is quite effective.
- Swift support s in Xcode and if Microsoft doesn't watch out their implementation might be miles ahead at their first try
- Swift 1.0 was a marketing 1.0, technically maybe a 0.2 release. I hope I don't need to touch it again in the next year even though I like the language principally