I wouldn’t call it “breaking standards” as much as “introducing new standards”. The protocols introduced by Kitty, like the Kitty Graphics Protocol and Kitty

I wouldn’t call it “breaking standards” as much as “introducing new standards”. The protocols introduced by Kitty, like the Kitty Graphics Protocol and Kitty Keyboard Protocol, were sufficiently well-documented that other modern terminals (e.g. WezTerm) have adopted them as well. Moreover, both protocols offer advantages cf. the modifyOtherKeys and Sixel standards used by e.g. xterm.