I've been doing CSS long enough to know that to get things work you often have to work with what you have and that means wrapping things inside (otherwise) redundant containers, etc.
Using a polyfill is less than ideal, but at least I have control over including this. And, it says it is under development, so I didn't even want to use that.
But, asking my users to enable a browser flag? That's a non-starter.
I'll file this under something interesting to revisit in a year or two.