The UI has in fact, evolved, but it has never changed. For example, higher DPI screen sizes, the UI is now instrumented in a web browser, no longer the the old TUI. It is fast, it is familiar, it's the same, but it evolves, if that makes sense.
If you know how to use it in company A in decade 1980, you know how to use it in company B today. That doesn't mean it hasn't improved or improved ergonomics.
It's a beautiful piece of engineering that got the basics right. Power users add whatever they need to it, modular, but it's not like Vim or VSCode where you are basically useless without a large effort when moving into a blank new updated version, let alone things like the ribbon design vs the old design in office.
