For developers debugging code, it is indispensable. For gamers trying to play Cyberpunk 2077 on integrated Intel HD Graphics from 2012, it is a dead end that will likely result in an unplayable 5 frames per second. Always verify that your hardware physically supports the API you wish to use before attempting complex system-level overrides.
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Ultimately, DirectX 12 relies on hardware-level architectural pipelines (such as asynchronous compute and dedicated resource binding) that old GPUs physically do not possess. Upgrading to a budget-friendly, modern graphics card that natively supports DirectX 12 (Feature Level 12_0 or higher) remains the only definitive, permanent fix for modern PC gaming.
The results of using DXCpl in this way are, at best, a "proof of concept" and not a viable long-term solution. The most common outcomes, as reported by numerous users across various forums, include:
DXCpl (DirectX Capability Layer) is a compatibility layer that allows DX12 applications to run on systems that do not support DX12. It acts as a bridge between the DX12 application and the underlying graphics driver, translating DX12 calls into a format that can be understood by the driver.