> Between 2013 and 2019, I was at Google developing the "LLVM lld linker". lld linker as open source software is kinda successful, and if you have a very large development scale, you definitely need to use it as a standard tool.
> [...] I could've got several hundred thousand dollars from the engineer job I retired (I was a Google Staff Engineer)
Software in general, open source or not, is not good business. If salaried job is not for you then consulting/freelance is pretty much the way to go for software engineers. Either way, you are selling your expertise and time instead of the end result.