3-5 years is the average time it takes to develop and finish a game with a AAA company.

1 year and 2-3 months from an indie dev company with a game still in alpha build.

.....Honestly....so sick of seeing the same thing over and over.

Valheim, since day 1 (ONE), is little over 1 (ONE) YEAR OLD. So far, the game has been extremely playable with so few bugs the devs should be praised for how meticulous they have been.

I was right about the last content release so i'll take another guess: Middle-End of May.