I find the ruby on rails migration path of github inspiring. https://github.blog/2018-09-28-upgrading-github-from-rails-3-2-to-5-2/ https://github.blog/2018-09

I find the ruby on rails migration path of github inspiring. https://github.blog/2018-09-28-upgrading-github-from-rails-3-2-to-5-2/ https://github.blog/2018-09-28-upgrading-github-from-rails-3... They show some details how to migrate on large scale yet be safe while doing so.