This is a blog post which could really do with examples. What kinds of changes and features are causing them anxiety about their code becoming 'obselete'? My ex

This is a blog post which could really do with examples. What kinds of changes and features are causing them anxiety about their code becoming 'obselete'? My experience is Rust is not changing very fast, maybe one of the release notes are of interest to me, and they are mostly 'oh, that's nice to have', not 'I must immediately rewrite all the code which could use this'.