the reality is this:
to maintain older technology, you need to use older technology.
the older versions simply wont work in DW cc.
If you need to be able to use them, then you need to keep DW 8 along side DW CC.
nobody is forcing your hand here, you are making the decision to move to DW CC. all decisions have consequences. the consequence in this case is that the older versions wont work with the newer DW Version.
you can still use your previous DW version work with the older extensions. If you make the decision not to maintain the the older version of Dreamweaver, that is your decision, not one we forced on you.