Space script is a pretty huge success. So it’s not going anywhere. Before it existed I had implemented a bunch of functions into the core:
Today, most if not all of these can be implemented with space script.
So I’m thinking of doing just that: to reimplement them in space script and make them part of the Library/Core library. I’ll do this in a granular way (one meta page per function) so that you can exclude specific ones and replace them with your own implementation. That way you could change the format of today() for instance.
I guess that as long as there are potential security concerns when using space scripts, you should not migrate to it and deprecate the original implementation.