The obsolete folder contains objects that should not be used anymore. Usually the OOD files also contain the information which successor object should be used instead.
The outdated folder contains old versions of objects whose latest version is available in the "normal" repository.
The reason that the NexeedMarkingLaserTrumpf is only available in outdated is that it uses NexeedMarkingLaserBase in an outdated version. I.e., NexeedMarkingLaserBase V2 is located in the normal repository but NexeedMarkingLaserTrumpf needs V1.1 of this object, which is located in outdated. This is technically the reason why NexeedMarkinglaserTrumpf was also placed in outdated.
You can use the Trumpf laser object without any problems as long as you don't need the Panasonic laser (which uses the base object version 2.0) in the same project.