Buy European

Well I mean, proton exists pretty much solely because of the steam deck.

proton existed many years before the steamdeck, and it's evident they intended it to be used WITH the steam deck, but it also exists outside the steamdeck, even then, it's still a huge incurred cost for a console that is actually super cost competitive for what it is. They don't even have that significant of a console market share, it seems like it's been nothing but a pet project to make gaming on linux more accessible, presumably because valve doesn't really like windows. Steam is 100% still WAY in the red on proton, and will probably continue to be for the whole lifetime of the project, it's unlikely they'll ever break even on it.