The request is in the title. I would to fix the retool version of my apps / releases or my whole account. This would give me a peace of mind that once I've built something it will run fine for a long time. With the fast pace of releases, often breaking changes are released or bugs slip through, which can render our internal tools unusable until we figure out a workaround / wait for a fix from Retool.
This would also make it easier for Retool to introduce good and necessary breaking changes without upsetting their user base unnecessarily, going through extensive tests and what I can imagine is a complex impact analysis of every update to an existing component / feature.
We would not want to manage an on-prem instance either.