[cryptonector]

Yes, that could be annoying. I'd imagine that you'd want to use only fixed-width fonts in a terminal emulator (where double-widths are ok, but not 1.5). If a fixed-width font has any glyphs other than single- and double-width then that's a problem.

[Joker_vD]

Most fixed-width fonts don't have glyphs for all of the Unicode code points, you see, so the terminal emulators use fallback fonts, and it's seems to almost impossible to learn what fonts exactly they use. I believe in my case those 1.5-width glyphs were taken from the DejaVu Sans font (the non-mono version) but it's hard to be certain. In any case, I was quite tilted that I had to go back to using 10♠, K♦ etc. instead of U+1F0AA and U+1F0CE in my TUI-based game.

[cryptonector]

Oh dear. I did not know this. I don't usually browse the web using elinks or such, but maybe if I did I'd know. Or if I wrote TUIs, like you do. I do use TUI MUAs, but I rarely run into this problem there.