This will definitely require rewriting some large bits of my modeline definition (or - more likely - switching the font back). As one of the comments mentions,

This will definitely require rewriting some large bits of my modeline definition (or - more likely - switching the font back). As one of the comments mentions, `window-text-pixel-size` is finicky at best. On one hand, I like the speed Emacs development is moving lately, especially in some core work that has languished for too long. On the other hand, I am starting to get some whiffs of immature stuff getting released too fast (flymake "v2" but still without a diagnostic overview buffer) and churn for churn's sake (why a whole new project.el instead of adopting or at least compatibility with projectile)? > menus and the toolbar The what now? :)