We currently use LM tool to manage our licence on the server.
As we download the latest Camduct versions, we noticed that it kills off access to older versions which is potentially the 4th version before it.
As a business, we try to use the latest versions to keep up to date especially my understanding its for Revit compatibility.
However there are some bugs (as confirmed by ADSK) in one of the latest versions that doesn't allow us to use OPUS parts we developed back in the old days (Camduct 2014).
This licence restrictions does not help the business who wants to do the right thing using the latest software but still have the flexibility to go back to the older versions when there is a need to do so whilst waiting for developers to rectify the issue.
Right at this stage, we don't have the confidence to go with the next version as it may still not address the bugs and restricts us from going back to the older versions to continue with our day to day business.