Who defines what is "worth playing"? You? No, thanks. That´s entirely subjective.
To me Bloodborne, Persona 5, Uncharted 4, Last Guardian, God of War, Horizon Zero Dawn, Spider-Man, RDR2, Detroit are more than worth playing, unless you can tell me wich PC games can surprass those. Oh wait, you mean a random 16 bit daily released Steam game? No thanks.
Yeah sure. 2x8gb of 3000mhz ram still cost 220€ in my country and a B450 board with acceptable VRMs (not that tomahawk or prime junk) cost around 140€. Talk about "kidding yourself". Also I would never pair Ryzen with 3000mhz as it depends so much on ram speed. 3200 is the bare minimum I would go with Ryzen, otherwise would instead stick to 2nd hand Haswell platform.
"Vega 56 performance" -> yeah sure, because Sony would waste resources on a new gen, just to barely beat the current Xbox One X. Makes total sense.