The highlight limit was raised to 255 pretty recently. Lights, Camera, More Highlights! (for some reason Google says its 31 still)
I believe this resource was made just for convenience sake and not with optimisations in mind (or OP may have not realised this was an alternate route at the time).
Some games may also just rely on characters simply sitting in workspace directly and not under a model in workspace.
This is an alright resource for small games (like small server sizes) but it can be improved like you and some others suggested.