Overhauls beacons to use exclusion areas in addition to distribution areas. Adds (optional) new beacons while preserving the functionality and usefulness of vanilla beacons.
Loaded an old game with quality and elevated rails but without space age:
Failed to load mods: Error while loading entity prototype "ab-focused-beacon" (beacon): Freezing is disabled and can not be used.
Modifications: Alternative Beacons
Ah. It seems I needed to add a check for the "freezing" feature flag to go along with the "heating energy" values I added to beacons in the latest version. Fixed.