Choice appropriate tools for your task, not the task for available tools. MS fans, Delphi fans, Java fans and now RoR fans are thinking second way - they love their tools.
The altrernative approach is about using mix of technologies and tools to complete actual tasks. Today's linux distributions, which are actually mix (if not mess) of applications and tools written on every possible scripting language is a good example.
In the area of web-development the same approach works the same way - you can build different [sub]services and [sub]systems with different tools which are more appropriate for some particular task. REST-JSON-Key-Value-Storage here, classic SQL back-end there and so on.
The altrernative approach is about using mix of technologies and tools to complete actual tasks. Today's linux distributions, which are actually mix (if not mess) of applications and tools written on every possible scripting language is a good example.
In the area of web-development the same approach works the same way - you can build different [sub]services and [sub]systems with different tools which are more appropriate for some particular task. REST-JSON-Key-Value-Storage here, classic SQL back-end there and so on.