I'm not sure the message is being conveyed properly -- looking up the GNU archive, it seems Bash 1.14 was the current release in 1995. Are people still making sure their scripts are compatible in Bash 1.14? Surely there's a subset of scripts that happen to work, but with numerous features that have been added since, there are plenty of scripts that won't.

Backwards compatibility isn't really about whether you can run code on _old versions_, but if you can run _old code_ on new versions. Scripts that were written with Bash 1.14 should work today (barring all the other external dependencies they may have...), but scripts that are written today won't necessarily work on 1.14.

That's the same as the Rust analogy: code written with Rust 1.0 should compile and run today, but code written today won't necessarily work on Rust 1.0 (albeit, there must be a subset of new code that would happen to work).