Eventually we hope to get to the point where we can play all SWF files and hence have Shumway be a complete drop-in replacement for the Flash plugin. Since implementing full support for all capabilities (and matching all quirks) of a two decades-old platform is a huge undertaking, we're not trying to get there in one big leap. Instead, we're gradually widening the set of supported content so we can get to something useful to end users sooner.