In cases where I've seen sites switch from Drupal to a custom-built ruby solution, the end result had less features (or were missing crucial features and user i

In cases where I've seen sites switch from Drupal to a custom-built ruby solution, the end result had less features (or were missing crucial features and user interface details that are trivial to enable in drupal), and they had more problems and bugs (and I would guess, have more security issues). Also, some of the reasons I saw posted for switching are not true, at least not anymore. For example, there are tools that allow for version control and collaborative development on drupal sites now. examples: p2pu, mozilla drumbeat, cloudworks http://cloudworks.ac.uk/ http://cloudworks.ac.uk/ which were all originally drupal sites On cloudworks, it forgets that I'm logged in everytime now. And it can't link together and display connected posts and people as easily as you can in Drupal, it can't email you updates and activity you've subscribed to, the site isn't mobile friendly (and think how easy it is to convert a site to be mobile friendly now in drupal & wordpress), the links are ugly and not seo or user friendly, etc. The site went down several times last month.