New guy here. We have a lot or models that never have material/colors applied, so a lot of the part grouping methods don't work for me.
"Retain Structure" works really well!... except things really slow down having every single face separated out.
I'm also aware i can click a body, and merge it, eliminating all the faces, but that takes over a minute on some of the parts I'm dealing with, and I would have to do that a dozen times.