Yes, in the C++ version the s-expressions are stored on disk exactly as they were before. The C++ version literally reads a file of Lisp code and executes it. As an instance of Greenspun's tenth rule, it's hard to beat.
The original Lisp version was actually running till last fall. When they introduced the C++ version you had to explicitly choose to "upgrade." There were some users, including me, who hadn't. Finally last fall they called me and told me they were going to move us to the C++ version. It's barely different.
The original Lisp version was actually running till last fall. When they introduced the C++ version you had to explicitly choose to "upgrade." There were some users, including me, who hadn't. Finally last fall they called me and told me they were going to move us to the C++ version. It's barely different.