At least in the Ruby community (where most developers are on Macs), it seems to be due to TextMate's lack of progress. A few years ago, it seemed like most Rub

At least in the Ruby community (where most developers are on Macs), it seems to be due to TextMate's lack of progress. A few years ago, it seemed like most Ruby developers were using TextMate, but as TextMate 2 got pushed farther and farther back (and started to look like vaporware and/or bloatware), they started to look around for something with the power of TextMate but with more extensibility. Some IDEs and a few TextMate extensions started to pop up, but I think it was a timely post by Jamis Buck that inspired a lot of Ruby developers to make the switch to Vim, then PeepCode came out with some stuff, then it snowballed from there: http://weblog.jamisbuck.org/2008/10/10/coming-home-to-vim http://weblog.jamisbuck.org/2008/10/10/coming-home-to-vim