I believe so. I don't think there were any of the older units shipping now. The modification wasn't a response to a weakness in the product, it was a response to a geometry requiring master level human welding because the robots are not capable of seeing a change in the process and thinking and adapting like a human being. So the newer geometry will permit more consistent looking welds to be applied in production. The old and new welds are both very strong.
We went back and forth with weld engineers from welding robot companies and they recommended slight changes to geometry.
It wasn't a money problem- we would happily pay for the master level welding- the welds were ~$7-8 per weld which is fairly high for circumferential welds. We tried several journeyman welders and were only able to find one welder capable of the cosmetic work we were trying to achieve, and he could not keep up with production volume, so that became a workflow bottleneck.