I think all it will do is raise the ceiling of what publishers are willing to price games at. If they think they can get away with it, they'll charge $80 instead of $70, with the rest being $70 and less just like it already is now.

Steam doesn't advertise at the scale of Microsoft, Sony, and Nintendo. It won't have a ripple effect because it won't change the degree to which artificial hype drives people towards the "Buy" button.

How much is Factorio worth though, everything?

Not ALL steam games have DRM. Yes, you should buy from GOG whenever you can, but if you use Linux like me, GOG doesn't give a shit. It can be hard to decide, support DRM free games and proper ownership with GOG, or expanding compatibility with Linux and improve it in general. If its cheaper on steam cause of a sale or something, I'll buy on steam, then years later like with DOOM 2016 for example, I'll buy it when it hits like 4 bucks on gog. That way, I have acces to an offline installer, and I show support and interest to valve for investing in proton.

I'd almost argue the same with modern consoles with all the crappy digital bullshit and planned obsolescence

Your not wrong. If it weren't for steam being absolutely stellar than I wouldn't be buying games from them. I would try to go through gog. But with their work on proton alone I personally give them a pass.