Nvidia has officially said that they will stop supporting SLI. the 3090 does still have the the connector.

  
      
      nvidia.custhelp.com
  
  
    

NVIDIA SLI Support Transitioning to Native Game Integrations | NVIDIA 15



  
  
    
    
  
  


I am not sure if the loss of driver profiles also means the loss of driver support going forwards and I do not know if this will affect using the cards for computation. Hopefully someone else can chime in as I am curious to know.