[wander_homer]

Of course they are. Your new generation terminals still use decade old protocols, using the same escape sequences to control the cursor position, colors etc.

The "lines" and other UI elements you see in those next generation terminals when you run TUI apps like neovim are still simple characters aligned next to each other to look like a line etc.

Stuff like GPU acceleration is only another layer which was put on top of all of that. At the core they're still using the same old technology.