Please note that Adobe distinguishes between requirements (to run the software) and recommended requirements (for smooth performance). Illustrator relies heavily on the GPU for rendering, so paying attention to the graphics card is vital.
When Adobe lists “DirectX 12 or Metal” support, they are not being pedantic. These are low-level graphics APIs that allow Illustrator to bypass the operating system’s overhead and talk directly to the graphics card. This enables massive parallel processing for effects that would take seconds on a CPU to render in milliseconds on a GPU. Consequently, a system that meets the CPU minimum but uses integrated graphics (e.g., Intel UHD) is fundamentally incapable of running modern Illustrator smoothly. The minimum GPU requirement is, in effect, a on the increasing complexity of modern visual culture. To work in Illustrator today is to work in a hybrid vector-raster environment, and that demands graphics hardware once reserved for 3D games. illustrator minimum system requirements
