Right tool, right job, etc. I built and run an internal tool for a company that went from a very dated coldfusion setup, to a cloud crm (expensive), to now simply using the rails application I built for them with fantastic sorting, searching, mass updates, login features, and export capabilities, you name it. It's has over 1M db records and is plenty fast for any mix of criteria.

Really cheap to run, low-low-low maintenance. I don't even need to touch it except if there are some security bugs that need to be patched and heroku handles backups automatically. In the event heroku has problems I run my own cron-job that does backups of the psql database and the application itself is put under version control.

I'm not sure there is another framework I could have pieced together such a smooth application with anything else in the amount of time and resources I had available plus without having to worry about it ever breaking because of some weird bug. Stability is very important for many businesses.

Once in a blue moon a new feature is requested and doesn't take long to make some changes. Now, would I use rails to fire up a basic website like I did in the past? No. I'd grab a static-gen like Jekyll and maybe some PHP to handle mail if needed.