If I’m remembering correctly, the original script he found had different emoji in the two lines (red X vs. green checkmark), but since HN comments strip emoji, pasting it here made them equivalent.
I'm pretty sure that's a Link MC5 terminal, which emulates DEC VT220 by default, but that font doesn't seem very VT220ish. https://vt100.net/dec/vt220/glyphs
emulating DEC VT's generally meant the full featureset of DEC ANSI escape sequences for cursor positioning, saving, colors, bold, etc. It would not include emulating fonts.
i googled and found this picture of a Link MC5 screen, though it's monochrome, don't know if they would have changed that.
Thanks! His active years as a programmer coincide with the FIG F-83 Mike Perry, which was a time when there weren't very many programmers. So it's quite a coincidence!