That was the first thing I looked for as well. I have a service monitor (combination tracking generator and spectrum analyzer) witch CGA output. There's a fair amount of old engineering equipment with CGA out. They typically have green CRT built in, but if you do hook up an external monitor you get a rather nice color display.

Not a total loss, CGA was also also popular in cabinet arcade games. You can get converter boards. All the ones I've seen had 5-pin headers and you have to build your own cable.

CGA 16 colour was only 160×100 (it was 80×100* text mode pretending to be graphics [1]). Much more commonly used was 320×200 4 colour.

* Font height changed to 2 pixels, so 100 lines of "text" instead of 25 (640×200 actual pixels).

[1] https://www.cs.mcgill.ca/~rwest/wikispeedia/wpcd/wp/c/Color_...