This version represented the final refinement of the generation before the transition to Stacks 5 . It is often cited as a highly stable "long-term" version for users on older macOS versions (like Catalina) who needed a reliable environment before moving to the newer API of Stacks 5.
Released in August 2022, version 4.2.5 focused on stability and internal asset management:
: Resolved a crash that occurred when first viewing a page.