No limit on the size of an article in theory. There's a 2GB limit on the size of an individual item. However, there's a real limit in terms of how long a user is going to wait for your content to display. In this day and age when users expect immediate gratification even over cellular connections, d...

Please note that roadmaps are subject to fluctuations based on a constantly changing set of requirements from customers, launches of new devices, changes in app store policies and a whole bunch of other things too numerous to list.  It's highly likely that only a small number of items on the roadmap...

No. An ability to copy articles/collections/cards and layouts is on the product backlog but sharing items between projects is not currently in the plans. Can you provide a use case and an importance?

Currently yes. I keep a 1 pixel transparent image around just for this situation. It's on the list of user interface improvements for a future release. It's high on the list.

We will look into both these suggestions.

We will work on getting some early documentation up on our devnet site.