Users will need to be signed into the Hub with their Unity ID and connect to the internet to use Unity. If the internet connection is lost, users can continue using Unity for up to 3 days while offline.
Always online tools and (single player) games are horrible and punish people who have no or limited internet connection. Speaking from experience, not everyone has a wired 1gbps fibre connection.
This is also from their new update:
Always online tools and (single player) games are horrible and punish people who have no or limited internet connection. Speaking from experience, not everyone has a wired 1gbps fibre connection.