> Hm. Can't really say, but I have recently encountered a bug in InDesign which > subsets a VF for embedding into a document and turns it into a static font... > without removing overlaps or setting the overlap flags, leading to even-odd > rendering errors in macOS Preview. So I plan on modifying the usual font > pipeline to indiscriminately enable these flags for VFs... at some point, > unless someone stops me. So, yeah.
I found that fonts in Mac OS 9 and above diligently flag overlaps, for example, in the Euro symbol in Times.dfont. So go for it! -- Alexei A. Podtelezhnikov, PhD