My employer has been around 40 nearly 50 years. We still run COBOL for 90% of our business operations. Day-to-day employees work in bluescreens built in RM/COBOL and RM/PANELS.

As recently as the 2010s, we used to emit HTML out of COBOL, but fell short of it directly responding to HTTP requests. Instead, we licensed an RPC layer that sits behind Apache and translates HTTP calls through CGI to a listener on the COBOL side that then invokes COBOL programs. Those programs send back HTML strings through the CGIRPC interface and, well, out comes a webpage in your browser.

We're still using it to serve XML and have turned it into a makeshift web service that helps power a traditional web application.

But, honestly, this is way cooler.