The Project Darkstar is a very interesting platform for build games with Java. Check out this video, or go to the project's website. I think we could learn a lot from gaming platforms in the Java Enterprise space regarding scaleability, performance or reliability.
Web Apps, SPA, PWA with vanilla Java Script (ES 6+), CSS 3 and WebStandards only. As simple as possible, but not simpler. See you at: (Progressive) Web apps, Single Page Apps and WebStandards airhacks workshops at MUC airport, Winter Edition
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