In January of 2014, Ken Case wrote:
“Most of the work in OmniOutliner 4 went towards rebuilding much of the underlying outlining engine to make it more flexible—specifically so that we could easily add features like filters… Some of those features shipped as part of the initial 4.0 release…while others (like filters) are features which we look forward to adding in the future, now that our outlining engine can support them.”
OO’s capabilities and usefulness would be enormously enhanced with filters. And it’s not like OG has to invent a new technology to implement them. They already have them in OmniFocus, and call them Perspectives.
