I think the only way we could land something like that in puppet 7 is if it was opt-in and puppet automatically translated from legacy to structured facts like https://github.com/mmckinst/puppet-lint-legacy_facts-check/blob/2fe12beff2c7c764f13303c46338fe9f7d6642fa/lib/puppet-lint/plugins/legacy_facts.rb#L29-L98