If youโre wondering why I have not continued whining like a little baby about MacOS font rendering, itโs because I figured out that Apple had to be lying about removing subpixel anti-aliasing from the OS. And they absolutely were.
The reason I suspected this is that removing a core OS feature that had been part of the system for over 20 years is not something one can just up and do trivially. They, of course, did not remove it because that is nearly impossible. So being the nosy-ass IT guy I am, I found the hidden settings and managed to re-enable it.
This is on MacOS Catalina 10.15.2 (very latest version) and I still have sub-pixel anti-aliasing (magnified greatly so you can see this):

Since I did many things to achieve this result, it will take me a while to guaranteed reproduce and write it up. I shouldโve kept better documentation but I was just experimenting. But I did it so itโll be easy to do again.