Respecialization
How to reset skill points and respec talents in Diablo 4
Talent builds did not exist in the days of the original Diablo; you were a Warrior, Rogue, or Sorceror, and had little gameplay customization beyond that.
How to reset your skill points in Diablo 2: Resurrected
Seasoned Diablo 2 players know this already, but those who started with Diablo 3 may be in for a rude awakening in Diablo 2 Resurrected, because you cannot freely respec your skills and abilities.
In Diablo 4, you can respec your character’s skills and abilities as much as you like, but it won’t be free
In the December 2020 Quarterly Update for Diablo 4, we found out that the Skill Tree for the game has essentially been locked in as a system -- as Game Director Luis Barriga put it in the post, the general consensus is that the Skill Tree is headed in a solid direction and now it's time to iterate on and improve it.