http://html.duckduckgo.com/

https://lite.duckduckgo.com/

These are still a thing for people who don't like JavaScript, so I'd give them some credit.

And it's not like these don't cost anything to run and maintain. Quite the contrary: bots love to use them, and it screws with their ads-driven business model. And yet they are still keeping these around.

I think that "noai", too, will keep going for a long time.