Rails 4.0 Whirlwind Tour Presentation

So as someone out of the rails world for a few years, I found the line about the webserver needing to be "thin/rainbows/puma <i>over</i> unicorn" hilarious, since I have no idea what any of those words mean.<p>Rails-world with your changing of servers and plugins-of-the-week, never change.

For anyone that lives near Atlanta, this was recorded at <a href="http://www.meetup.com/atlantaruby/" rel="nofollow">http://www.meetup.com/atlantaruby/</a>. Our next meetup will be November 14th if you want to hear more awesome talks like this one. &#60;/shameless plug&#62;

Argh. I'm on an iPhone and I can't read this because they made their JavaScript just blindly redirect to their mobile site without any regard to the specific page I was on. I wish people would stop doing that, or at least provide a way to opt out of the redirect.

Of course the most used ActiveRecord method is going to be the one that changes most frequently! Let's change it every release!

Rails newbie here: Can someone explain how ActionController::Live compares to websockets and other similar technologies? Pros + Cons + if my comparison is even sensible?

I'm really liking live streaming, opens up rails to be a simple back end for simple games.

Anyone know if Jruby is compatible already, or will I have to wait for it to catch up.

Aaron Patterson (tenderlove) had a blog post where he talked about the necessity of refactoring rack. I guess that is a larger project that isn't happening right now but that should lead to real performance improvements.

Under the "Most Important Change" header: <a href="http://speakerdeck.com/u/alindeman/p/rails-4-dot-0-whirlwind-tour?slide=4" rel="nofollow">http://speakerdeck.com/u/alindeman/p/rails-4-dot-0-whirlwind...</a><p>I was wondering why so few police departments were using Rails.<p>* on a more substantial note, the biggest migration changes seem to be requiring Ruby 1.9.3+, elimination of 2.x "find" syntax, and no more vendor/plugins.