It's a good time to move on. The Switch has built an extraordinary library of games for a handheld at this point and the redesigned models give you lots of choice in terms of functionality and price.
I rarely move on completely from older consoles personally. There is always something in the backlog which I didn't get around to back then and maybe I want to replay some old favorite occasionally too. Finished a Gamecube game this week and started one for the GBC.