Show HN: Single-spa micro front-ends that co-exist each with their own framework

Doesn't the s in spa already stand for "single"?

We are actually using this in prod. It's been pretty good, and has enabled the mingling of quite a few different frameworks. Angular, React, and Ember can live together!

I guess my question is, why can't frameworks co-exist without this? Can't you just lazy-load them in?

This is scary.