Kicad has a bunch of examples of boards made with Kicad on their homepage.
Tons of stuff on par with a Raspberry Pi or BeagleBone Black, with DRAM, eMMC, and PCIe routing, plus all the fine pitch placements for supporting circuitry. PMICs get dense in these applications.
https://source.mnt.re/reform/reform
https://source.mnt.re/reform/pocket-reform