I enjoy it solo, of the runs I have done, solo and with 2 multiplayer groups by far solo went the furthest.

Solo is a bit harder in a few ways.

Combat differences:

In combat having multiple players allows for a tank player who goes in and grabs enemy attention while the other(s) use range weapons or attack from the rear. For example in my last multiplayer group I grabbed the attention of trolls while the others shot it in the ass, the one who tried to melee always died when he got its attention.

Having somebody to watch your back- when solo if you are building or harvesting resources and get snuck up on you will have the wrong items in hand but if in multiplayer you can have one person stand guard if the locals have been giving you issues.

Corpse escorts- when you die you drop your gear and therefore in solo you are either nude or using old gear to recover your corpse while in multiplayer you can have the others escort you back to your body to collect your body.

​

Non-combat differences:

Multiple hands let you gather resources quicker and allows gathering of multiple resources at one time, somebody mining while someone else chops trees and another gets food.

crafting stations are easily shared for the most part, therefore more hands makes the cost per player lower.

Carrying weight- the player has 300 units of weight so extra players give extra units which helps when transporting heavy items like metals.