> The supposed performance gains from monolithic kernel being wasted on features that mimic microkernel features.

So two things:

1. Containers don't have a meaningful performance hit. (They are semi-frequently used with things that can have a perf hit, like overlay filesystems, but this is generally easy to skip when it matters.)

2. I don't think containers meaningfully mimic microkernel features. If I run everything on my laptop in a container, and a device driver crashes, then the machine is still hosed.

And still manage to run better than a complete microkernel