I am not a C developer, but I found the “helper has a terrible name” and “it’s not clear what the helper is doing” arguments a bit weak.

Who in they right mind does not think the helper creates a 32 bytes word by putting the 16 bytes of the first argument followed by the 16 bytes of the second one ?

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Awesome idea. In base 64 to deal with all the funky characters.

It will be really nice to browse this filesystem…

Wrong, some were mentioned:

These systems offer some seriously compelling stuff - updates that either work 100% or roll back automatically, no more “oops I bricked my system” moments, better security through immutability, and way fewer update headaches.