On the other hand: it's nice to see the march of pixel density increasing which makes this problem go away entirely.

I used an LG C2 42" as a monitor for a few years. The color fringing was particularly bad for me because I like yellow text and LG uses RWBG. 4K 42" and 1440p 27" are about 110 DPI. This is not enough. 4K 27" is about 160 DPI. That is enough. We've already pushed past needing to care about subpixel layouts if you properly weight pixel density in your selection.