The blog author's problem was a brief bug that was introduced and fixed between releases for the rare use case when a data-bound view is re-rendered. We fixed this problem and the author confirmed that the patch was "working great."
https://github.com/NYTimes/backbone.stickit/issues/66
So even though the problem was fixed for the blog author before he moved onto angular, he still claims that stickit causes memory problems. I guess a false claim like that makes the story of moving to a new framework more entertaining.
Another claim from the blog author is that stickit makes it hard to use third-party plugins like Chosen. Around the same time he filed the github issue, we were finishing and getting ready to release "handlers" and a new "initialize" binding which give you the ability to create global handlers for setting these kinds of bindings up. More on handlers here:
http://nytimes.github.io/backbone.stickit/#custom-handlers
... and an example of setting up a global handler for Chosen: