Django is comparable. A little harder to deploy (well we have docker now so who cares) but still incredibly productive.

I mean, with Django, literally just defining your database models in models.py and not touching anything else is enough to have a working application with a full featured admin backend with authentication already built in.

If you define your models correctly with the good constraints you are literally left with writing your HTML views and/or API endpoints, adding permissions and call it a production app.

I’ve never touched Ruby but it also sounds like we shouldn’t discard RoR in terms of productivity.