Operating Income/Profit is the ONLY thing that matters. At the end of the day, if they have more money in their bank account by selling less but also consolidating their teams down to cost effective sizes and reducing redundancies, it's a win. Selling 100 mil of one device and one set of teams you have to pay salaries to and advertise for is better than selling 250il devices where you have to pay double on everything due to different games/markets if they have more profit at the end of the year.
I think that saying it's the ONLY thing that matters is an oversimplification, but yeah, in general I think fans are much more concerned about sales records than developers. As a fan, I'd rather see Nintendo have a smooth transition to their next console then have the Switch outsell any particular system.