Artifact 2.0 never really turned out to be what Valve had hoped for, now it is announced that it will close down the development completely, but it is still possible to play.
Valve tried to increase the interest in Artifact several times, the last attempt was with the beta of Artifact 2.0 where they did what they could to attract new players, but unfortunately the interest was very low.
Artifact 2.0 changes its name to Artifact Foundry at the same time as Valve chooses to shut down the development of the game completely. However, we will still be able to play Artifact and it will now also be free. It will also not be possible to buy the card packages, so what is available now is what remains until the day Valve chooses to shut down Artifact completely.