Just leaving a note to myself for future reference.
Needed to rebuild the kmod-wl package because of a borked update process (something made the computer crash mid-update).
A bit of Google searching brought me to the script in /etc/kernel/postinst.d/akmodsposttrans.
Running sudo /usr/sbin/akmods --from-kernel-posttrans --kernels `uname -r` rebuilt the missing kmods and a modprobe wl got the wifi back up and running.
Running sudo /usr/sbin/akmods --force (for the current kernel) or sudo /usr/bin/akmods --force --kernels kernel version (for a specific kernel) works as well.