As I noted in https://news.ycombinator.com/item?id=45433715 , this is likely down to following Kitty's lead and agreeing with Kovid Goyal's rationale.
The world of terminal emulators is diverging and has been for some time. There are the terminal emulators that are designed to emulate prior real terminals, with one codepoint per cell, support for original bitmap fonts, support for conventional TUI effects with MouseText/block/line drawing characters, and so forth. And there are are conversely the terminal emulators that are heading towards having an entire WWW browser/wordprocessor-like Document Object Model, with embedded images, reflowed proportionally-spaced document lines instead of a strict cell matrix, arbitrary font scaling, hyperlinks, and so forth.