3ds is likely to be phased out with the switch taking over as Nintendo’s home and portable. Still, loads of cheap games for them about my kids love theirs, the eldest has a 2ds now though as the hinges go on the 3ds and the screen falls off. Daughters is fine but she doesn’t use hers as much.
For minecraft though, pocket edition seems to be more feature rich, even than the console version, we have it for wiiU and the kids both have it for their ipods. The eldest uses his ipod more, as you can use mods on that but not on the Wii.
I don’t see the appeal personally, but that’s me.