It's not trivial and I found a lot of races, yes, but I refactored over a couple days to completely isolate work within a goroutine so that data is only passed

It's not trivial and I found a lot of races, yes, but I refactored over a couple days to completely isolate work within a goroutine so that data is only passed in and out of them via channels, and with that all races went away. The tool has been used in production extensively for a couple of years now, converting 3D model files from one format to another, and it's running great, and very fast as well. So, you're right, but it has been addressed.