When Thomas E. Dickey [1] stops taking care of Xterm (and much else), it will be the end of an era.<p>[1] <a href="https://invisible-island.net/" rel="nofollow">https://invisible-island.net/</a>
It can also display images using sixel [0].<p>[0] <a href="https://en.wikipedia.org/wiki/Sixel" rel="nofollow">https://en.wikipedia.org/wiki/Sixel</a>
My favorite xterm capability is the ability to display Tektronix vector graphics.<p><a href="http://sites.science.oregonstate.edu/~landaur/nacphy/coping-with-unix/node140.html" rel="nofollow">http://sites.science.oregonstate.edu/~landaur/nacphy/coping-...</a><p>I started combining that with subleq as an experiment in minimalist programming.