Well, that's the importance of stable APIs. You only need a new copy on major revisions, which are rare. libcurl, for example, claims to have had a stable API and ABI since 2006 (https://curl.haxx.se/libcurl/features.html#stableapi). Why do we only get zlib?

I bet many Android devices already have at least 9 copies of sqlite, since so many apps ship their own copy.