Your comment must be entirely about Containers for Windows (by Parallels), which is not what the article and most of the discussions are about.
Containers for Linux on the contrary are not prone to host "corruption"
The main thing that is a non-neogotiable for my uses is one container should not be able to affect another.
In this way, Linux is less prone to "corruption" as you may see it, but given your implied familiarity with PV, I think you know what I'm referring to with there being plenty of gotchas floating about, especially in regards to sharing or using multiple kernels.
Anyone who's run multiple systems originating from different sources and being moved between hosts over time, know the reality of running different kernels.
Linux PV is not 100% issue and risk free as you implied, it certainly gives you a nice boost for some trade-offs. They are just trade offs I am not prepared or interested in handling for a small amount of ram.