How to handle big changes in your Help Center content.

Hello Community.

Soon we are going to be making big changes to our platform and the way some processes work, which will also affect the content we have on the Help Center.

I was wondering in some of you have undergone something similar and what the best way to approach these updates/creation of new content is. 

At some point, we will have users in the old platform version (these users will be periodically moved to the new platform) and some in the new version, so I was also wondering what's the best way to show content for all users.

Thanks in advance, and I will be happy to provide more details if necessary.