It's not about newness thing. It's about software bit rot. Every piece of software lives in an ecosystem. Libraries even more so. Unless the ecosystem is dead,

It's not about newness thing. It's about software bit rot. Every piece of software lives in an ecosystem. Libraries even more so. Unless the ecosystem is dead, there are always small changes over time until the code is outdated and should be replaced or redone. This has happened with lockfile. It has been superseded and shouldn't be used anymore. You say if it ain't broken don't fix it. That's only reasonable if you can say with 100% certainty that it won't break ever in the future. Otherwise you're building software debt.