I found that if you delete them. Viewport performance increases somewhat considerably… considering the wgts_rig has maybe 250 mesh child objects.
After deleting them the rig still looks correct and still usable without illeffect… tho basic testing was done… I don’t know if problems would happen in the future?!
Anyways here is a info
It appears the rigify rig which made them are needed should you want to use your rigify rig in Blender 2.80. something to do with the latest experiment 2.80 not having a fully up-to-date rigify plugin…
Opening / importing blender project files from 2.79 into 2.80 the rigify rigs don’t show up fully… only a few bones would show up if you have all the layers enabled for the rig.
I read somewhere that if you select all in the project… Goto edit mode and back to object mode. The rigs components show up (torso box etc)
I tested this and verify that it works.
Without the wgts_rig (ie: deleting them for performance) would mean if for some reason you need to repair/reenable a rig… It might be impossible! Without those wgts_rig objects…
I hope this helps.