There are many games coming out for the Switch still on top of the huge library already available, many of which are now discounted because they’ve been out a while. Iirc they’re not even going to announce the successor until 2025, meaning it may not arrive until 2026. They’ll prolly aim for it to be on shelves in December 2025, but the OG Switch was released in March so who knows.
Anyway, does your kid want a switch? By the time the second comes out they may have decided they’re a PC gamer. Hell by the time you get back from the store they may have decided they’re going to play guitar not games. Kids move fast.