Windows 11 still contains EmulateHeap, a Windows 95 memory-manager compatibility shim
Windows 11 26H2 retains a compatibility fix called EmulateHeap that reproduces Windows 95's forgiving memory-management behavior for older applications that depend on it. The feature traces back to a 1990s bug in SimCity, where Microsoft rewrote part of Windows 95's memory allocator to stop the game crashing rather than wait for a patch, and later generalized that fix into EmulateHeap to keep other legacy apps running on newer Windows versions.