Relevance of past Premiere Pro versions
As a subscriber to Premiere Pro CC, I have not been editing for some time. As a result, I am not familiar with why I should keep so many versions that are now apppearing from versions 6 to 14 in Creative Cloud. I have projects created over 3 years that are in the process of being completed. When I open them, I find some need converting to the latest update that so far does not create any problems for me. Since 1990 when I first used the Adobe Video Collection and through the various upgrades, I am wondering what is the reason so many upgrades are listed. This also applies to many other CC apps that presntly appear in my subscription.
What is the purpose and why would I need to keep the various updates previous to the present version 14 for Premiere Pro and other app present versions?