I've inherited a self-hosted retool installation on version 3.120 (helm 6.2.x) and I'm aware we're quite far behind. I want to upgrade to the latest version but I'm wary of large jumps.
Besides backing up data and thoroughly reviewing the installation after upgrades, is there anything about the Retool release increments or contents, that I should be aware of before I try either one big or several small upgrades?
I would echo @mbruijnpff's recommendation to break up the move into smaller moves to the stale releases.
Here is one of our docs with more details on incremental upgrades. You will be able to view the changes, which will help you understand if there are any components or features that are depreciated that will be either missing or not supported as the apps change.