Declining languages
google.com
google.com
Another interesting one, digg is falling, while reddit is steadily climbing: http://www.google.com/trends?q=reddit%2C+digg&ctab=0&...
I know these are also skewed because of other reasons people would search for these terms (ie, "ruby", "python", "java", or "arc"). But the graph of a term that's unlikely to be confused with something else ("Ruby on Rails") seems to make sense in terms of what the number of searches ought to be.
If you add Ruby, Python, or Lisp, they just show up as straight lines along the bottom.
While Ruby broke out with Ruby on Rails, Java is firmly entrenched and as someone who is trying to learn Ruby/Ruby on Rails - I'm finding the learning curve painful as Ruby/Ruby on Rails is more than just a syntax or a language it's a different way of doing things. We're trying to justify a small project (business case) but even though the application we are intending to build is perfect for RoR - they are almost like why not Spring/Hibernate/Flex.
I believe many Java programmers are happy that Java is a near default language for a lot of non-startup IT/software shops - you can't learn Ruby on Rails from a 5-day bootcamp.
Scripting languages can be harder for crappy programmers, as you have to be extra careful, especially in large programms. While in java, editors such eclipse are very good with auto completion, generation of stubs, finding references, etc... that can make even a crappy programmer semi-productive.
Usually, big boring corp attracts only crappy programmers (if you are smart, you probably are working somewhere else), therefore Java is the default language.
Hence the resistance for change in big corps to switch from java to something else.
Even if you are smart programmer at big corp, you will find often Java is the only "allowed" programming language by your bozo CTO.
Let's create a language called "porn" and make it the most popular language ever.