I like the open-type features of Affinity Designer. My sense is that this movement has two goals: making the features work; increasing the usage of the features because the interface is easy to use, handy, and reveals the font features in a visual way. I think that's why this is mostly about the interface. For example, I might know that a font supports alternative glyphs. But unless I can see those glyphs, I can't imagine (let alone see) how the alternatives might improve my work. An interface that makes those alternative letter forms visible with a handy preview (or something) and easy to select would help solve the problem of underutilization of typefaces.