You created Duo Plan & Family Plan. Yet Spotify hasn't implemented it fully. Netflix did.
It is too much of an effort to do a logout & login just to switch playlist for another family member on a single device. This will be my reason why I will cancel my family plan. It is also an insentive to create easy passwords, which also makes this a securityrisk.
So please create an easy way to switch accounts under the same subscription.
Without this feature, both plans will have a low adapt rate. Listen to your early adaptors, or new business models like these will never start working, and numbers will stay low.
Closing this ticket because it wont get 50votes within 3 months, means you are not taking "early adaptors" in account. Search your own forum, and you will see its a topic since 2016.
PS: Or don't call it a family plan. Call it a group discount offer.