That might be true, some apps just don't follow standards well (on MacOS too btw, there are old and ugly UIs from third-party vendors all over the place).
But when you're living between a terminal, editor and browser, and fonts are perfect on these 3 (or whatever else you use)... it's hard to justify using a lesser and more expensive platform, just to correct the 1% of the time some app doesn't look great.
In fact, if we speak 'consistency' in a functional way — not disturbing the user's "flow" while working — I'd argue that bad or extremely limited UX the likes of Windows and now sadly MacOS too (by comparison, and because it got worse in the last five years) is a much bigger problem than font rendering, for most workflows.
Case in point if you really care you can fix font rendering for pretty much every app (and select aliasing parameters like strength and RGB ordering to conform to your external displays panel type and pixels 'pitch'; whereas MacOS or Windows will be hit-or-miss with some models and you just can't help it). Haven't needed to on Ubuntu or Fedora, but I know as of 2017 Arch let you apply general font rendering settings over GTK and Qt, and you can use terminals like urxvt to fully control such things.
But when you're living between a terminal, editor and browser, and fonts are perfect on these 3 (or whatever else you use)... it's hard to justify using a lesser and more expensive platform, just to correct the 1% of the time some app doesn't look great.
In fact, if we speak 'consistency' in a functional way — not disturbing the user's "flow" while working — I'd argue that bad or extremely limited UX the likes of Windows and now sadly MacOS too (by comparison, and because it got worse in the last five years) is a much bigger problem than font rendering, for most workflows.
Case in point if you really care you can fix font rendering for pretty much every app (and select aliasing parameters like strength and RGB ordering to conform to your external displays panel type and pixels 'pitch'; whereas MacOS or Windows will be hit-or-miss with some models and you just can't help it). Haven't needed to on Ubuntu or Fedora, but I know as of 2017 Arch let you apply general font rendering settings over GTK and Qt, and you can use terminals like urxvt to fully control such things.