What I find most impressive is the design was made using EasyEDA, JLC's web PCB design tool, and only on a four layer board. That BGA with DDR4 on 4 layers is something!
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It doesn’t have the versatility of KiCAD but is lighter and easier for light use or occasional design of moderate complexity.
Footprints are a point in EasyEDA's favor, but in simple circuits, almost all footprints are universal. If you want a 10K+5% resistor, you just put in a 0402 (maybe larger if you're planning on hand soldering it) and pick the exact part afterwards.