I was disappointed by Kusaba and documentation / support available. I understand that is hart to run project alone. I can understand pre-release code, bugs, little to none support. Its OK.
I was pissed out when you abandoned project like a child. No word of explanation, no warning, nothing. You should keep domain, make statement on the front page and let it run for a year befor closure. Just to make clear what happpened, why you decide to quit.
I will not have high expectation with your new shinny python imageboard. I know that sooner or later you will fall in love to another language and this project will follow Kusaba fate. Good luck, and next time try to quit as mature person.