[joouha]

Do any terminals support overprinting? This could radically change what is possible in TUIs

[yjftsjthsd-h]

I don't know about overprinting per se, but you can already use whatever foreground+background colors you want; how much benefit would overprinting be?

[joouha]

This would allow more complex shapes to be drawn by combining multiple glyphs, which would be useful for complex TUI applications (there are only a limited number of box-drawing characters available) Also, this could allow drawing more than two colours per terminal cell.