For libs, yes, for applications dev, no. I would expect fixing an application to an older version would be just fine, so long as you don't need newer language

For libs, yes, for applications dev, no. I would expect fixing an application to an older version would be just fine, so long as you don't need newer language features. If newer language features are a requirement, I would expect that would drive refactoring or selecting a different implementation language entirely if refactoring would prove to be too onerous.