Just ported the blog to Pelican and removed all Jekyll files. Currently it seems the most logical choice for me
First, I started to use reST much more extensively than Markdown and I want a blog generator that supports it better
Second is my new interest in Python
Third, Pelican seems to have much more features that I like compared to Jekyll and other static generators that I tested, especially Python ones (however Nikola also seems a good alternative but I had to stop at something)
UPD (May 2020): Nikola feels waaay better.