Item Structure Logic for an MMORPG+

Do i understand this right.
The type of Structure in an Parent Actor System is outdated to use?
Do other MMORPGs using Data Asset systems to manage there Items etc.?

I dont know if the Data Asset system ist compatible and easy to use in a inventory system.
This sounds to get dirty after long time.

Need a simple and good modular system to manage items, in inventory and in gameplay.