Most of these updates were bugfixes and minor tweaks, bigger updates were not that often. I expect the upcoming eventsystem to be large, with loads of text and lots of code (for each event), and there’s probably more going on behind the scene. Let’s not forget that they still had to quit their jobs, get a new working place and more on their plate.
You can go and look through the blog and check how often there were updates in the last year and how big these updates were. Maybe it’ll give you a better feeling for how often these bigger updates happen.
