Shifting the blame to the customers is pointless here. Most of them can't do anything about it. They are either incapable or just not interested after the system came with the PC.

What would be the point for those people to change to Linux if they can't do there what they've bought the product for?

And yet somehow the Innovator's Dilemma exists.

Given how not great Steam's Linux push worked out, it's not entirely surprising it stays the way it has... for now.

Yes. I want Steam on Linux to work as well.

It is working. I sure didn't expect platform parity when they announced it, and yet, I don't feel like a 2nd class citizen anymore. Linux games are now cross platform, not terrible ports. And the 3 largest game engines now compile to linux out of the box (more or less). The support burden has lessened as well. It is great all around.

Oh, I didn't mean to imply that it didn't work, or there were shortcomings in the platform... only that sales haven't been great (think Steambox, etc).