One common theme I'm hearing is that individuals want a "way to grow big" but with the ease of getting started quickly while having an extensive ecosystem.
Flask was written on top of Werkzeug as an example of how to build a "roll-your-own" web framework. It has a few shortcomings, but overall, it's OK and you can contour it to whatever you need done. After all, if Flask starts to "wear you out," you can always graduate to just Werkzeug.
I think there's an opportunity here for something like this to be built on top of Pyramid, which I've found to have a very extensible API. The main problem with Pyramid is the perception to newcomers - there is more than one way to do it and it doesn't have any opinions on how you should go about doing something. It leaves it up to your imagination. There's a slight trade off here between an opinionated framework and the extensibility of Pyramid.
I think the problem with not being opinionated is that 3rd party libraries have nothing they can rely on. Do you write 3 sets of templates for the 3 most popular templating libraries? Do you provide models for SQLAlchemy AND Django? Or do you pick your combination of dependencies, and let someone else reimplement your library with a different combination?
That's where I think Django shines. It might not have the best templating library, ORM, or routes frameworks. But app developers and library developers know exactly what they have to integrate with. This encourages a better ecosystem.
Flask was written on top of Werkzeug as an example of how to build a "roll-your-own" web framework. It has a few shortcomings, but overall, it's OK and you can contour it to whatever you need done. After all, if Flask starts to "wear you out," you can always graduate to just Werkzeug.
I think there's an opportunity here for something like this to be built on top of Pyramid, which I've found to have a very extensible API. The main problem with Pyramid is the perception to newcomers - there is more than one way to do it and it doesn't have any opinions on how you should go about doing something. It leaves it up to your imagination. There's a slight trade off here between an opinionated framework and the extensibility of Pyramid.