The pfSense config works on all versions to perfectly restore the configuration.
At least on the hardware I've owned, OpenWRT has to be reconfigured after version upgrade or else it becomes unstable.
At least on the hardware I've owned, OpenWRT has to be reconfigured after version upgrade or else it becomes unstable.
Thankfully all the config files are plain text and can be manipulated however you like. It is usually not too difficult to take working config while fixing or disusing problematic files.