There is probably a bit of that image clinging to the Switch, but I get the sense at least that most of that image has eroded, as the consoles has an extremely diverse lineup of games, many of which are considered "mature" or at least games that appeal to ALL ages. Though I suppose you're never going to completely wipe out the kiddie stigma if your company mascots include a cartoony Italian plumber hopping around shouting "yahoo!", a pink puffball, and a little green dinosaur, and you create games that look very colorful and Pixar-esque.
But if anything, I think overall the kiddie stigma has been replaced by the "casual" stigma mostly during the Wii era, which in turn has been mostly replaced during the Switch gen by simply being a handheld and therefore a "low brow" form of gaming or "not a true console." Though I don't think these views are widespread from where I sit anyway, and I'd still prefer that sentiment over "kiddie" and "casual" though.
"We hold these truths to be self-evident - all men and women created by the, go-you know.. you know the thing!" - Joe Biden
