My son plays Fortnite all day and I think that's not good, because the game is so violent and it's about killing.
The Killerspieldebatte has a beard. I would rather worry if my child develops an addictive behavior.
If you are of age, you can't do much.
If not: Just limit the computer-smartphone game console duration to 1-2h. The rest of the day he should spend in the "analog" world.
What about school performance?
This will not answer your question, but here's some extra information about Fortnite:
http://www.usk.de/service/informationen-der-usk-zu-fortnite-battle-royale/
How old is your child? Apart from that, gambling is bad all day anyway… Even if it's Tetris.
