This is one of those subjects that come with the disclaimer "do as I say, not as I do".

Some fasteners are designed to be single use. They can only be torqued to the right spec once. After removal, that spec may not be met anymore.
Lock nuts depend on friction for the locking function. Once removed, that friction may not be sufficient anymore to guarantee safety.

This is not only the case for stuff like lock nuts but also, e.g., the bolts that hold the brake calipers in place. They stretch when torqued. That ability to stretch is lost or greatly diminished after removal. Hence they also should be renewed.

The replacement of 940 wheel bearings seems rather straightforward. The author of that article recommends packing extra grease in a new bearing, although to me it seems like a very sealed thing. Also looks like the bearing is integral with the hub and ABS ring and should be replaced as a whole assembly? Talk about wasteful.

My 92 245 still has the old fashioned crown nuts, only the split pin should be replaced after removal.