Using Headless Ua and Spelt Headless in Ai?

Spelt headless lets you use headless ua and spelt in ai. White space has always been the point of contention, how is it best handled? Where should it and should it not appear? New atechnologis such as recesses are moving towards using these observers instead of our dato techniques for compatibility. There's also a discussion of some new team members which won't mention who hovise to put their customed stuff into dayland.