It does raise the entry-level cost for customers buying just one component.
One user interface for a stack of inverters and charge controllers.
My Sunny Island each have 3-line display and membrane keypad. Sunny Boys have display only.
With WebBox, I can apply a change to all of one type. Data is logged and downloadable to a PC. I have eight devices connected, but some systems would have a hundred.
For one-time configuration, an RS-485 adapter on a laptop, or keypad for units with it, can get us going (for SMA, maybe not Rosie). Newer models use Bluetooth or Wifi, so smartphone can be used.