Atlas 2.x -> 3.x feature parity

[chrisknoll]

This discussion will be used to manage features that previously existed in Atlas 2.x and has been requested to be carried forward into Atlas 3.x.

The below list will provide a list of ongoing efforts (and completed efforts) of functions being migrated.

We ask the community to reply in this thread of they would like any previous functionality to be incorporated into Atlas3.