And DXVK. And VKD3D. And contributions to upstream Wine. And Gamescope. And the best handheld console thus far. And going against common industry practices by supporting the right to repair said console.
Valve keeps improving regardless of the competition, but I think the idea was that Valve could do nothing for the next decade and probably still have the best storefront.
They actively made the storefront worse with the release of the Steam Deck. At least there is still the backdoor through search to get to a reasonable interface for filtering/searching.