I am surprised it uses macOS as the demo, as I thought it would be harder to control vs Ubuntu. But maybe at the same time, macOS is the most predictable/reliable desktop environment? I noticed that they use virtual environment for the demo, curious how do they build that along with docker, is that leveraging the latest virtualization framework from Apple?
I think Microfrontends could really work pretty well if you have end to end vertical tooling support, like organization unified package management, authentication, logging, error tracking, testing, CI/CD etc. If any team can bootstrap all of these vertically supporting any major frameworks, then it might be a good idea. But let's face it, most of us don't have that luxury.
But the best thing about docker is that it's not a VM. It's a containerization layer built on some linux kernel (only) features. It's not fair to compare it to a VM, or even to put it in the same class of programs.
But you will only need 1 VM :) For realistic testing of a multi-component stack, performance gains start adding up very quickly. There's also the start/teardown time if you want to run tests from a clean environment repeatedly.
In short: the right way to use VMs is as dumb chunks of hardware. Using them as logical units of software makes increasingly less sense as container-native tools get better.
