New swarm please!
I post this a year ago:
“Lightmass calculation and quality, swarm distribution methods look old fashioned and time consuming. I tested network rendering for swarm and it is really useless. Cores does not work together. You can not use your cores efficiently . As said before that one core has a job and another cores wait in vain. Unreal team must write new renderer in short term, maybe in UE5.”
You can find critics at this topic : Why I think Lightmass is completely out of Date - Architectural and Design Visualization - Epic Developer Community Forums