Posit numbers will be commonly used in the future. The OP may have found this unfortunate, but the Posit concept itself is indeed still very young (from 2017), and not yet mature enough (in implementation) to have replaced IEEE-754, especially in hardware accelerators. Remember that IEEE tried to come with a failed replacement (IEEE 854) in the mean time, The cited library cannot be faster than hardware obviously, but also not in software, and is definitely not the same as 5 years ago. Posit neither, as the standard was published in 2022.