I use it and it works great. The only thing I'm missing is support for trim_blocks and lstrip_blocks. Without this my templates are a dashes in curly braces {%- -%} hell.
It has a python wrapper, albeit less full featured that jinja2 which is pure python.
Mini jinja also runs in wasm. Nice.
Use the nunjucks js all the time! Really works so well and the performance is insane. Render 20 plus just in time in a React Lowdefy app and no lagging. Would love to see a performance benchmark for a wasm version of this!