with the main config file in /etc/systemd/network, and a drop-in in /run/systemd/network/wg0.network.d, the changes in the drop-in are not applied unless touch /etc/systemd/network/wg0.network is run before networkctl reload. even if networkctl delete wg0 is run, the old config file is still used during reload. strangely, both the original and drop-in files are re-read, but the changes are not applied.