Kostal Smart Energy Meter - real added value or obsolet?

I am planning to buy a Kostal plenticore solar inverter and use the home assistant integration to add it to ha’s energy dashboard. But I am not sure whether to buy the Kostal smart energy meter also. I can not see any added value to what I am planning to do. Am I wrong?

If it is anything like the SMA smart meter it is required to determine your import and export. Your inverter will only show what is produced, not where it goes.

I am yet monitoring my import and export in home assistant by using the sml-integration. It reads the values from my two-way-electricity meter.
So the Kostal Smart Energy Meter is obsolet?