Sounds like my kiddo, who is 6.5. He loves his video games, and loves playing them, and they have educational games on tablets at school, that we also got for him at home because, well, at least he's learning Math. That being said, we do limit time on the actual switch to only weekends. And with other activities he only has 1 night a week where he can really be on a tablet in the evening, and only educational aps.
But similar stuff as you describe. He's obsessed with Mario (which came from the movie first, to be fair), and we played Link's Awakening together on the switch. We got him minecraft but he hasn't figured it out on his own yet, and we're not pushing. But he talks about Mario or other games pretty much non stop to strangers, asking questions about it, etc.
It's something we're monitoring with him as well. Most of the game time is with Mom and Dad, however. Not that we want to be doing that all weekend either.