@vandoren.david
Let's say you have five versions of an IDW and five versions of the DWF.
You perform an Update View on version five of the IDW, version 5 (and only version 5) of the DWF is deleted and recreated. Once the operation is complete, you still have five versions of the IDW and 5 versions of the DWF.
All DWF versions are not deleted, only the latest DWF.
DWF files are special in Vault which is why they are hidden.
When you create a DWF file during check-in, that is called an uncontrolled visualization file. The yellow bar will appear in the View tab of the IDW when you view the DWF.

Why, because the user could have different settings for creating the DWF.
When a DWF file is created using the Job Processor or Update View, that is a system-controlled DWF and the yellow bar disappears. Why, because the Vault settings will control how the DWF is created. These are the settings in the Visualization Publish Options. This makes all DWFs created the same in the Vault. This also ensures that the DWF file matches the IDW and is created with the setting set by the administrator, not by the user.

If you want to ensure your DWF file represents the latest copy of the IDW, then let the Job Processor create it. Don't put marked-up DWF files in the middle.
Update View does not do anything with the IDW file. It doesn't have to. Its task is to create the visualization file, not touch the IDW.
@vandoren.david wrote:
If I were to check the "unlink on check-in", wouldnt that break visualizations all together (i havent tried).
Here are three scenarios of what happens when you have checked the Check-in option to break the link on check-in.
For both scenarios, there are five versions of the IDW and five versions of the DWF linked to each other one-to-one.
Scenario 1
- Check out the IDW
- Edit the IDW, and save it
- Check in the IDW and create a DWF on check-in
- Version 6 of the IDW and Version 6 of the DWF are created and linked.
Scenario 2
- Check out the IDW
- Edit the IDW, and save it
- Check in the IDW and Do not create a DWF on the check-in
- Version 6 of the IDW is created with no DWF
- Versions 1-5 of the IDW still have versions 1-5 of the DWFs linked
- Click Update View (Locally or Job Processor) on version 6 of the IDW and version 6 of the DWF is created and linked to version 6 of the IDW
Scenario 3
- Check out the IDW
- Edit the IDW, and save it
- Check in the IDW and Send the DWF creation to the Job Processor
- Version 6 of the IDW is created with no DWF
- Versions 1-5 of the IDW still have versions 1-5 of the DWFs linked
- Once the Job Processor completes the DWF creation job, version 6 of the DWF is created and linked to version 6 of the IDW.
@vandoren.david wrote:
What benefit does having the dwf linked to the idw provide?
It provides exactly what you asked for, a DWF that represents the version of the file it is linked to.
@vandoren.david wrote:
What would happen if I broke all idw to dwf links?
You can't break all IDW to DWF links. You can only break the Tip version link.
There are five versions of the IDW and five versions of the DWF linked to each other one-to-one.
You detach the DWF from the IDW at version 5. Really what you are doing is creating version 6 of the IDW with no DWF. If you go to the History tab, right-click on version 5 of the IDW, and select View in Window, the DWF associated to version 5 of the IDW will appear.