The complexity of an update does not depend on the specific update but more on the version your forum is at before the update, and the versions of Postgres, Redis and all the plugins you have.
So it’s basically impossible to tell whether the update is going to “hurt”.
I’ve done updates from 1.8 to 3.5 without issues, and updates from 3.2.1 to 3.2.2 that cost me hours to fix.