> Embedded-graphics includes bitmap fonts that have a very limited set of characters to save space (ASCII, ISO 8859 or JIS X0201). This makes it impossible to draw most of Ratatui's widgets, which heavily use box-drawing glyphs, Braille, and other special characters
You have a bitmap display, you can just draw lines and stuff without needing to rely on font-based hacks.
Sure, but that's beside the point.
Text based graphics with fancy or custom fonts is just crazy efficient. That is exactly how we got the amazing graphics of The Last Ninja or Turrican on machines with less than 64KiB useable RAM.
Same for more modern embedded devices. If you constrain yourself to text you increase both runtime performance and your developer productivity.