| Feature | Requires Anniversary Update? | Why | |---------|------------------------------|------| | | Yes | Uses Windows ML (Machine Learning) platform introduced in 1607's DirectML | | Content-Aware Fill on Fill Layer | Yes | Relies on new memory mapping APIs in kernel 14393+ | | Live Blend Mode Previews | Yes | Uses updated Presentation Foundation (WPF) graphics stack | | Cloud Documents | Partial (offline cache requires 1607) | Anniversary introduced per-app network isolation | | Export As... UI | No (works on 1511, but slower) | Legacy code path |

Before version 1607, Windows handled stylus input as a "mouse emulation." The tablet drivers had to trick Windows into thinking the pen was a mouse. This led to notorious issues: jagged lines, lack of pressure sensitivity, and input lag.