Ruby is more fashionable than Java web development. PHP is more fashionable than Ruby. Go is miles more fashionable than PHP. Python is more fashionable than GO. These change as Ruby was way more fashionable than PHP 10 years ago. Golang was way more fashionable over Python 2 years ago. PHP was more fashionable to Python 15 years ago.

Java is still fashionable because of android development.

Hasn't Ruby been unfashionable for a while now?

Superseded by something else. No surprise there.