As with any technology, there are its supporters and its detractors. I would say that it's popularity has definitely waned in the last 10-15 years, probably in

As with any technology, there are its supporters and its detractors. I would say that it's popularity has definitely waned in the last 10-15 years, probably in part due to Javascript gaining more ground, perceived performance problems with Ruby and the fact that many frameworks in other languages adopted some of Rails's best features (such as convention over configuration, DB migrations, unified project structures, etc.) and ignored its worst parts (such as monkeypatching).