Well, modern OpenWRT doesn't run on original WRT54G at all, and barely on the upgraded WRT54GS version, so there is that. 32MB of RAM that the PS2 had would be

Well, modern OpenWRT doesn't run on original WRT54G at all, and barely on the upgraded WRT54GS version, so there is that. 32MB of RAM that the PS2 had would be really tight for modern kernels. https://openwrt.org/supported_devices/432_warning https://openwrt.org/supported_devices/432_warning But CPU-wise I don't foresee that ~300MHz MIPS would be any sort of major roadblock.