Framework end-of-life is the most commonly overlooked EOL category. Teams carefully track their runtime versions but rarely maintain a formal lifecycle calendar for the frameworks built on top of them — even though frameworks have independent EOL schedules that can expire significantly earlier than the underlying runtime.
Frameworks present a unique challenge: they are updated frequently during active development, then quietly abandoned at EOL. Security vulnerabilities in framework code — authentication middleware, template rendering engines, ORM layers — are disclosed after EOL with no patch available from the maintainer.
Django 3.2 LTS reached EOL in April 2024. Rails 6.1 reached EOL in October 2024. Vue 2 reached EOL in December 2023. Angular 17 reached EOL in May 2025. These are all recent EOL dates for versions with large production install bases.
Framework upgrades often require code changes beyond a version number bump. Breaking changes between major versions — renamed APIs, changed defaults, dropped functionality — mean upgrade projects need proper scoping and testing. The earlier migration starts, the more runway the team has to address compatibility issues.