Bungie has been having connection problems and players are reporting error codes.
Once the maintenance was done, the gameplay continued on Europa which starts a new campaign.
For those with less than level 1060 the play may be a tad tough as there are lots of hard to kill enemies so grinding may be needed to accumulate enough upgrades. Enough resources from playing Europa are available for players to level up substantially.
Players with less than level 900 should play very Europa carefully so that enough play can be accumulated to get more equipment etc.
With about 60 hours into the game so far, the gameplay and quality of Destiny 2 shows that this game is built for 4K rigs. Kudos to Bungie for making Destiny 2 an oasis of excellence in the face of mediocrity.