Without knowing what your library does, it's hard to tell if the simplification benefit is worthwhile when traded off against the lack of usability from apps wh

Without knowing what your library does, it's hard to tell if the simplification benefit is worthwhile when traded off against the lack of usability from apps which should not be blocking worker threads. Could well be, but overall I'd just use Tokio and Reqwest (which has a module exposing a blocking API, even!)