Development is very, very active. See for yourself: https://git.savannah.gnu.org/cgit/guix.git/log/ https://git.savannah.gnu.org/cgit/guix.git/log/ The FSF is

Development is very, very active. See for yourself: https://git.savannah.gnu.org/cgit/guix.git/log/ https://git.savannah.gnu.org/cgit/guix.git/log/ The FSF is GNU's sponsor, and provides some infrastructure, but generally hasn't done too much in terms of funding the project. However other funding has happened in terms of NLNet, Outreachy, GSoC, and some stuff with the Guix HPC project. But far and away the majority of contributions are from unpaid contributors.