My blogging engine [1] is almost 25 years old now. Have I rewritten it? If by "rewritten" you mean "from scratch", then no. I haven't. It has, however, seen several serious workings and refactorings over the years (the last great one was the removal of all global variables [2] a few years ago). Starting over would have been just too much work.

[1] https://github.com/spc476/mod_blog

[2] As therapy for stuff going on at work.