Mostly harmless
Yes you can. You can build a PC with a RX7600 CPU for about $600. That’s about in the same performance ballpark as a PS5. If you mass produce those and trim down some features, you’ll be able to hit $500. And you won’t have to pay the Microsoft tax. Sadly, this is also why it’s not happening. I’m 100% sure MS are furiously working behind the scenes to prevent anyone from coming out with a system like this.
I don’t mean to say that this is for everyone. But they sold a couple of million Steam Decks and I’d bet there’s a market for a couple of tens of millions of these boxes. And I’m not talking Windows here but Steam OS (or some derivative). That’s based on Linux but you’ll never notice unless you want to. For most people it’s just a store and a launcher. While maybe not quite as easy to use as a console, it’s certainly doable for the average gamer.
Sounds like snake oil to me. If it were that easy to induce fusion, it would have been done long ago.