This announcement terrfies me. I dont think MS now has developers that are competent enough to reliably change core parts of Windows like the Explorer (taskbar). This plan will not only introduce bloat with reduced performance, but will also reduce core stability further. (Explorer has hanging issues since the april update). So please, please, please @Marcus. If you want to add stuff, please do it in side apps. Leave the core alone, that's above your ability currently. For the core please only focus on bug fixing and removing bloat again.

Who gets to do the customizing though? Suspecting that "auto hide the taskbar" will suddenly become more popular. Oh no! "Your taskbar buttons will be back after these important messages"