Like everything, it depends. Is your son capable of self-regulation with the Switch now? Does he get his work done without you having to nag him all the time to get off the Switch (or other distractions)?
If he isn’t yet able to self-regulate, I would wait and see how he is doing after a semester without it. If he is ok on that front, let him take it.
You should have no illusions, though - even if he doesn’t bring his own, he will play with other people. It can be a really good thing socially and stress-wise, so long as it doesn’t take over.