This new tool can help you plan an upgrade of a PTC product, while considering other PTC products you use, and key variables in your environment such as Database , browser and Operating Systems.
For a brief demo of the tool, check out this short video: Release Advisor Demo - YouTube
I tried the tool to see my path from Integrity 11.2 to the latest Windchill RV&S.
The first step, where it asks which product I wish to upgrade, only lists the last three Windchill RV&S versions. So I can't even get past that.
What am I missing, or is the tool simply not available pre-version 12.3 ?
Hope you are doing well and nice to hear that you are planning an upgrade.
As you rightly guessed, the tool has released this year and is up to date on recent releases.
As an alternate, please refer to this link and if necessary work with PTC Tech Support to plan your upgrade.