I... surely you're joking. The Steam Deck poses no serious threat to Nintendo.
It's not remotely possible for Steam Deck to have the sort of first-party integration Nintendo accomplishes around co-op games, multiple controllers in multiple configurations, motion controls, pairing, latency, suspend/resume...
Like, have you used a Valve product before? They're beautiful and inspiring but... when they work, it's still not Nintendo quality.
The vast, vast majority of Nintendo customers know nothing of game mods or competitive multiplayer or care about latency or netcode. I doubt the majority even play Smash or any fighting game.
It's not remotely possible for Steam Deck to have the sort of first-party integration Nintendo accomplishes around co-op games, multiple controllers in multiple configurations, motion controls, pairing, latency, suspend/resume...
Like, have you used a Valve product before? They're beautiful and inspiring but... when they work, it's still not Nintendo quality.
The vast, vast majority of Nintendo customers know nothing of game mods or competitive multiplayer or care about latency or netcode. I doubt the majority even play Smash or any fighting game.