The legacy products are included in SONAR for compatibility w/ older projects, not to be cutting-edge 32 bit.
The CCC idea is splendid. Of course, older products from 3rd parties wouldn't be available for users who didn't purchase the SONAR version w/ that product, but all of Cake's stuff should be.
That should be a Cake priority (not top, but up there), since the whole raison d'etre of CCC (for us users) was convenience and organization. If you like your old plugs, you can keep your old plugs. The rest of us don't have to download them or wade threw them in our drop down menus. Excellent.