Solo play is great. Team play just offers some amazing moments and game play.

There's lots to do so in a team it's divide and conquer.
1 goes to gather wood.
1 goes to gather food.
1 goes to gather ores.
Build new big thing.
Team up to explore new area together.
Big fight happen.
No one knows what to do.
Someone dies.
2 run away. 1 dies. 1 gets away.
1 helps other 2 get thier drops back.

Lots died but we're laughing and having a good time?

Good game.

Valheim can be completed solo, and many prefer it. There is really no pressure to play co-op if you don’t enjoy it, and you can do both in the same playthrough; co-op is seamless, friends can join your solo world (crossplatform PC and Xbox) with their existing characters, and you can join any other world with your existing characters. Some restraint is needed as this can be exploited, skipping progression by “smuggling” advanced materials and gear. There are mods to prevent this if you want.

Enemies scale in difficulty when multiple players are in proximity of each other.

You can tweak the difficulty settings on existing worlds from the main menu, no commitment. Tailor the experience to what you find enjoyable. The most common complaint is that resource gathering is a little slow solo, so you can turn up a multiplier that makes it faster if you like.

1000 hours, AMA.