That seems to be true. After looking into the Linux implementation, I realized that it's python and not something more low level. The differences amount to an extensive syntactical refactoring, at least on the library porting side, but it's still a large amount of super tedious work that I can admire. Getting it to work with WebUSB though, having a high proficiency with TS, and putting in the work to write tests for it all is also impressive.