Jekyll is written in Ruby and therefore it is poorly supported on Windows. All the solutions of running Jekyll on Windows are maintained by community. It seems to work on Bash on Ubuntu on Windows 10, though (has someone tried it?).
WP has grown past being just a blogging platform and as such it's not as lightweight as it used to be. It also considerably more complex due to many more customization options compared to other solutions.
Nikola posts may be written in a variety of formats. You can write posts in HTML, with all the expressive power of HTML and CSS, and still have the benefits of a site-wide theme and navigation structure.