<p>So <a href="http://www.techcrunch.com/2008/05/01/twitter-said-to-be-abandoning-ruby-on-rails/">Twitter is leaving Rails</a> and I bet Rails programmers are not happy with this. Their #1 success application at a large scale is leaving the building.  I guess now it&#8217;s more difficult for them to persuade businesses to start using Ruby on Rails.</p>

<p>One the other hand, <a href="http://www.jaiku.com/blog/2008/04/08/wroom-were-moving-to-google-app-engine/">Jaiku is moving in to Google App Engine</a> and I guess they&#8217;re using Python. They&#8217;re minimizing the risk of scaling issues (something they could have learned form Twitter&#8217;s success). I still wonder what&#8217;s the key think that makes them working on Jaiku. Is it Android? Or some killer-feature?</p>