LibreSSL is mostly a drop-in replacement for OpenSSL, while BoringSSL has removed things that some applications will depend on. OSes shouldn't/couldn't replace

LibreSSL is mostly a drop-in replacement for OpenSSL, while BoringSSL has removed things that some applications will depend on. OSes shouldn't/couldn't replace OpenSSL for BoringSSL (the article says as much) but could replace OpenSSL with LibreSSL (some already have).