Please see here:
Update as of July 2023:
The Zorin OS Direct Upgrade (do-release-upgrade) path is now released rendering the following thread a piece of archived history.
For the Current Guide, please see here:
The commentary below remains for the record and the thread is now closed.
Zorin Group company has announced that they are working on a Direct Upgrade path (the do-release-upgrade command) for a major Zorin OS release to the next major release. These are not 'point-releases' but are moving for examp…
ZorinGroup is developing a direct Upgrade Option.
There have been some scams on Reddit- promising an easy method- It will not upgrade the system, it will only break it. There are current existing threads from users that tried that...
This has been noted on the forum in a thread:
Claim:
That changing the Sources for Zorin OS to focal and then running "sudo apt update && sudo apt upgrade" will upgrade Zorin OS 15 to Zorin OS 16.
Status: False
Performing the above procedure will not upgrade Zorin OS 15 to Zorin OS 16. It will only break it.
If you think about it, this makes sense. If it was that easy, Canonical would not have needed to develop the Ubuntu Direct Upgrade build. And users would have been using the simple metho…