Well, I've never wanted to jailbreak my Kindles, but of course it would be better if they could be patched like Kobos. That's probably not going to happen, though. I agree patching is a huge plus for Kobo. I think I have over twenty patches enabled - advanced font controls, header-footer sizes, home screen (don't want to see any recommendations there), line spacing, custom font sizes, dictionary popup, synopsis etc. etc. It's really fun to do all that.
Many-many thanks to the authors of the patches!