TLDR: There are three new maintainers (https://github.com/one-more-minute https://github.com/cldwalker https://github.com/joshuafcole). The docs are now community owned. The plugin server will be soon. We will be hosting a weekly hack night in our new office to get community members up to speed.
And now it looks like they have found something else more interesting to work on anyway.
I still run PyCharm in a separate workspace for debugging, running programs and searching through code, but for editing I find LightTable is wildly preferable imo.
There are some mostly minor annoyances, like the behaviours file simply switched locations at one point, and for some odd reason I can't get the tab settings to work properly for makefiles and such.
I will probably stick with LightTable for the forseeable future, nothing else quite seems to hit my sweet spot. Admittedly I haven't actually tried sublime text.
Did you have some weird plugins installed? Did you create a bunch of Clojure processes and count those?
EDIT: Ah, there was a memory leak for a while. I bet that's what the problem was. It's definitely fixed in master.