Jemalloc, a memory allocator that has been in use for nearly two decades, has ceased active development, reflecting on its evolution from a project aimed at improving memory allocation in FreeBSD to its integration within major software like Mozilla Firefox and Facebook. The article discusses various challenges, successes, and the eventual decline in support for jemalloc at Facebook/Meta, highlighting the complexities of maintaining open-source projects in corporate environments. Despite its end, jemalloc remains available as open-source software.