> Realistically how many hours of work went into this upgrade process then? Eileen wrote about the actual process a year ago when GitHub upgraded from Rails 3.

> Realistically how many hours of work went into this upgrade process then? Eileen wrote about the actual process a year ago when GitHub upgraded from Rails 3.2 -> 5.2: 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...