I'll be keeping it.
I always hang on to my old consoles; I still have my SNES, N64, Gamecube, Wii, etc.
Never know when I'll feel like firing it up for old times sake, as I doubt playing the games on Switch 2 would evoke the same feeling.
There's also software I still plan to play on Switch 1 like Eternal Life of Goldman and Prodeus: The Elder Veil.