Obviously, no company wants to cannibalize their new product by actively promoting the predecessor product. Ideally, every company wants their consumers to buy the newest (and most expensive) product, that's a no-brainer. However, not promoting doesn't mean to kill-off the old product. If the old product is still popular it will naturally continue to sell well (given its age). That's what will happen to Switch 1, no pormotion by Nintendo anymore but the thing will still sell well, considering its age. Nintendo will not call those buyers and try to convince them to buy the Switch 2 instead because essentially it's also a Switch 1 and has so many more advantages. A portion of the late buyers are simply not informed and buy the old product - no loss for Nintendo as those people usually aren't as engaged into the ecosystem anyway (i.e. they will buy 3-4 games and that's it). Others simply buy an additonal system (or two or three) for their child(ren). For their kids, they don't want to spent too much money (i.e. Switch 2 will be too expensive for that). Other late buyers probably just make an instant buy on black friday or whenever they have that extra money at hand. There are actually various scenarios why people still buy a Switch 1 in 2024, 2025 and even 2026.