Can't really complain if they offer Spotify Family which gives you 6 separate premium accounts, I think it's only double the cost of a normal Spotify account.
(and I am back to caring for my own mp3 collection again and use spotify only for rare and new stuff)
I have two children, myself. I just installed second account on an old phone which has no SIM card in it, it has all the kids playlists and I don't have to worry about them getting recommended any of my 90s thrash metal. :)
Come on, guys, I'd expect better from HN than complaining about features which already exist.
https://community.spotify.com/t5/FAQs/What-is-Private-Sessio...