Not OP, however it is fine. I worked in a similar stack as OP with a small team (however it used Ruby/Hanami instead of Python/Django, and of course the differe

Not OP, however it is fine. I worked in a similar stack as OP with a small team (however it used Ruby/Hanami instead of Python/Django, and of course the difference between both stacks). The code had ~100k LOC for the main service (we also had some other services that had dozen of thousands LOC) and it was completely fine to maintain. Most errors we had wouldn't be avoided by static typed since they're logic errors, not programming errors. Sure I prefer static languages nowadays since I work in a much bigger company, however I think the benefits of static languages is overhyped.