I've been thinking about getting a Switch for a couple months now since I'm curious about Breath of the Wild (though that's the only game I'm interested in) and my wife is super into Pokemon (I only played Blue way back in the day lol)
Thing is, a Switch successor must be on the way right? In my mind it seems like it could be a waste to get a Switch now but then again who knows if Nintendo will make the next console backwards compatible. How likely do you think that is?
I haven't made up my mind yet so any discussion and/or advice is welcome.
Switch successor likely isn't coming anytime soon. Probably 2-3 years away.
Switch has tons of great games and plenty more coming out in the future. Obviously it is worth it. But you state you are only interesting in BotW. Not sure how that could be considering the incredible library, but if you're only interested in one game it probably isn't worth it. BotW is incredible, but it isn't worth buying whole system for it! Might be worth it for your wife though considering there's a bunch of Pokemon games on the system. Maybe your wife gets it for Pokemon stuff and then you can get BotW. And who knows, maybe you'll discover all the other amazing games on the system too.
But if your worry is about it being replaced soon I wouldn't worry about that. And I mean, if you are only interested in playing a single game, why would you even care when the next system comes out anyway?