It's only in Europe where Nintendo is discontinuing Switch 1, and likely to do with the Right to Repair laws we have here

Nintendo has confirmed the decision to halt sales of its Switch 1 console in Europe will not affect its operations in the rest of the world. The company, which recently revealed it will stop selling the original Switch console in Europe starting mid-February 2027, has clarified that it's not ending sales everywhere else.

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source https://www.eurogamer.net/nintendo-switch-1-sales-continue-globally-europe-discontinuation