When a "feature" upgrade is performed such as the Anniversary Update (v1607), original Creators Update (v1703), or Fall Creators Update (v1709), the update will clear at least (1) Restore Points, (2) Event Log entries, (3) Windows Update History, and (4) Reliability History. Basically you are installing a new operating system, and using restore points from previous versions would mess things up. You do have the option of rolling back to the previous version for a period of time if you have issues with the new version.
JohnD