Meanwhile, on desktop I can't paste between Emacs and Confluence because Atlassian went out of their way to break it.
I know what people are trying to get at here, but I think there's also a lot of tunnel vision and selective memory.
Realistically, it's only easier to share data on the PC if the application developers made it easy to share data. There's no shortage of proprietary and undocumented file formats. Heck, there's a small industry built up just for converting CAD files between different formats.
It's really not much different on the iPad.