In practice it works because GP is exaggerating. Arch does hold back library and/or program updates until they work together, or simply ships multiple major rel

In practice it works because GP is exaggerating. Arch does hold back library and/or program updates until they work together, or simply ships multiple major releases of libraries, and have a separate testing branch. Right now e.g. there's openssl (still at version 3.0.x, because nobody supports 3.1.x yet) and openssl-1.1 (1.1.x-y) to handle the rather slow migration of upstreams to the new major release.