I'm not very active on here but just throwing in my 2c.
I come here because a bunch of you are smart and know a lot about the SC2 editor so it can be helpful to pick your brains. If the community as a whole moved to another site such as the hive workshop I would follow. Also I think it would be a much better option moving forwards.
If someone wants to learn about the editor it's kind of embarrasing linking them to here.
As for lost information/assets we can still link back to those pages that are good sources. Maybe it's because I mostly deal with triggers but almost all of the resources for triggers appear to be nothing more than data dumps from the editor with nothing of value to add. In fact when there IS extra information provided it is sometimes even factually incorrect. Any assets such as libraries which are still being supported will be copied over to a new site by the person maintaining them. All the old broken assets will be abandoned.
On the whole I think it would be a possitive step.