Nintendo always did decently because their console was in a lot of cases, peoples second console. However this may change with the switch.
We can agree most people who bought an xbox one didn't buy a ps4 and most people who bought a ps4 didnt buy an xbox one. This is the case 99% of the time because no one wants to pay TWO online subscriptions.
The number 1 thing the wii U had going for it was free online. People will purposely not buy this gens nintendo console because they know they wont pay for online.
PAID ONLINE IS A HUGE PROBLEM FOR THE SWITCH
First of all the quality of their online service will not be as good as xbox live or psn.
Second, nintendo becomes less attractive as a second console.
Third, the switch will not have enough third party games to justify paying 60 dollars a year for online. Games like splatoon 2 will be empty and inactive mark my words!
Forth you guys always talk about pokemon saving the switch. Pokemons largest userbase are 8-12 year olds. Do you think they are going to pay for online service to play pokemon? I dont think so!