On Sat, Sep 28, 2019 at 12:46 AM Fu Yuan wrote: > Regarding the encourage effect Stefan mentioned, I think Elisp sources already > have this effect and is better than C source in this aspect because it’s easier to > understand, manipulate and play around with. I couldn't agree more. Any Emacs user already has an Elisp interpreter installed, and can change, explore, experiment. Having the elisp sources at hand can be a useful tool for learning and extending. The C sources are anything but trivial to understand, and cannot be changed unless you invest time in setting up a build environment. Anyone who will know what to do with the C sources, or even will learn anything from them, quite likely will already know how to get them.