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Twitter post by Daniel Feldman (@d_feldman): Linux is the only major operating system to support diagonal mode (credit [Twitter] @xssfox). Image shows an untrawide monitor rotated about 45 degrees, with a horizontal IDE window taking up a bottom triangle. A web browser and settings menu above it are organized creating a window shape almost like a stepped pyramid.
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Another funny concept
Hmm yes, web dev horrors beyond my comprehension!
That, right there, is a perfect example of why folks need to stop trying to shoehorn web apps everywhere they don't belong. It's a use-case for a proper native mobile app if ever there was one.