My experience of Triplebyte's interview process is slanted towards frontend/backend developers of web apps. Fortunately for me, that was my background. However, in the team I currently work with, the team is in aggregate heavily C# with only secondary experience in web frontend/backend development. That's because their expertise is in low level security. Several developers on this team are exceptions to the "don't roll your own cryptography" adage.
They're all competent developers, but the version of Triplebyte's coding test that I took (and passed) would be in unfamiliar territory for people in this team. That's fine since most of Triplebyte's clients are probably looking for web frontend/backend skills, but I think this means that Triplebyte's test shouldn't be seen as an objective measure of programmer skill, just an objective measure of fit for Triplebyte's clients.