Which is better: Junk Store or Heroic?

Hopefully not a dumb question: If Vulkan runs on anything, assuming their game isn’t a Windows (Xbox?) exclusive, why don’t more people program their games to use Vulkan instead?

What does proton do?

I only vaguely understand it as “thing that makes game playable on other thing.”

(And also I have six versions installed on my steam deck whydoIneedsixofthese?)

Well there’s your other problem.

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Next, you’re going tell me a billionaire’s involved somehow!

Well there’s your problem.