> magically solves everything

This is the real problem. Too often frameworks/libraries are geared towards making things magic instead of making things solid. Magic solutions are usually very one dimensional. e.g. The Magic only works for a really narrow use case, or at low load. I don’t think this is specifically a problem with “mini frameworks” but homegrown stuff exhibits this more, if only because magic solutions tend to die in the wild when the bug tracker is full of “this only works for trivial case; make it actually work”.

When frameworks/libraries advertise how easy they are to get started, there is often a lot of magic to make it trivial to start and they don’t scale to real projects without breaking through all the magic abstractions.