All of these are doable with LSP. I'm a big fan of the "LSP rename" action which will rename a particular semantic item (e.g. a method) across files, or the refactoring actions (e.g. change an "if let" into a "match" in Rust).
Everything is doable with LSP as it is an extensible RPC essentially.
But the above things are not done in LSP generally. It doesn’t have first-class support for structural search replace. It doesn’t have support for interactive refactors which require user input.
Do you have an example of a language server capable of structural refactoring of the type mentioned in the GP? The “semantic rename” is table stakes from ~20 years ago in IntelliJ and ReSharper, and even Eclipse.
