Taking a different and hopefully more productive stance than the other guy, I just want to explore people’s thoughts.
People already have built these alternatives. Itch.io, EGS, Humble Store, Microsoft Store, GOG. These platforms exist, but they struggle to achieve the full market dominance that Steam has as the “default” platform, meaning Devs are borderline forced to accept the 30% cut if they have any hope of making sales.
As shown by Steam’s huge profits, they certainly take a higher cut than they have to, and they can definitely stomach a smaller cut