Honestly the biggest uphill battle that Hyperion is going to face is rebuilding the decade-plus of existing Java plugins and functionality that have become ubiquitous in the Minecraft ecosystem, like Permissions, Anti-grief, Anticheat, etc which have had decades of man-hours invested into perfecting their functionality. Some of this can likely be ported and knowledge reused, but _someone_ is going to have to actually do the heavy lifting of porting it into a language that has a (relative to Java) higher learning curve.