I was curious about 'granular view of the "Quadruple Layers: Levels of Enterprise Abstractions" within a typical enterprise context', but it looks way too granular for the image size. :) My guess is that "-20" in the "ep-abstractions-20.png" file name represents 20% of the original size, but the link points to the same file instead of a 100% version.
https://github.com/wso2/reference-architecture/blame/15adfac9dc952de9b55d9030f43bdf524488f16d/internal-developer-platform.md#L182