Like irahul has said, the issue is the Flask extension ecosystem and documentation lag rather than Flask itself. Which basically means YMMV depending on what yo

Like irahul has said, the issue is the Flask extension ecosystem and documentation lag rather than Flask itself. Which basically means YMMV depending on what you need to get done :) If you are writing most of your own code and not using Flask extensions then you could well be fine (unless, like the linked post says, you discover a few months down the line you _do_ need a couple of extensions and they haven't been ported yet!). Also worth pointing out that lots of other great python libraries now fully support python3 so you can get a lot done with just Flask on its own and those e.g. requests, redis-py, psycopg2, pytz.