Question:

• What do we do with regards to the Runtime.Arch property for Mac Catalyst?

Possibilities:

1. Remove it.
   Con: existing code won't compile / increases binary incompatibility with iOS.
2. Keep it, and return:
   2.1) Simulator
   2.2) Device
   2.3) A third value (MacCatalyst?)

Time estimate (for Sebastien's proposal here): 4 weeks