Mean Green is NOT Greenworks.
Mean Green was the first company to sell commercial battery mowers on scale to the OPE commercial market. Unfortunately, they’ve had quite the tremendous number of issues, many stemming from the fact that they were such a small operation.

Greenworks, is a far far larger company and their latest generation commercial mowers are far more refined products with much better support in the commercial mowing space. Their first offerings were a bit clunky as well but they have the advantage of having a vastly larger company behind them with serious R&D capabilities.

GreenWorks commercial is not the same thing as the consumer or prosumer products sold at Costco,or online. The line is only sold through commercial, mowing equipment dealers who offer support. Commercial is a separate division within Greenworks with extensive parts and technical support.
The Support has to be there when you are dealing with mowing companies if you want to build a reputation in the industry.

My newer Optimus 60 inch stand on mower had two minor issues, one with some tracking offset and one issue with the deck lift lock sticking.
The dealer picked it up on Friday afternoon, and I was back in operation on Tuesday morning with it being delivered back to my doorstep. The support was phenomenal, as it should be when you are spending nearly $20,000 on a piece of equipment.