I assume you ask because of DX12 for Shadow of the Tomb Raider. That is still not working again since I had to switch the profile back to DX11 due to some Steam overlay related chages. If/when DX12 for the game will become possible again, it will be re-enabled. In case you need someone to blame: the correct addressee is located in Bellevue, WA, USA, which incidentally is the location of Valve HQ. ;)