I do! I missed the "web command-line" functionality so much I made a self-hosted replacement for it that can be run from a local file[0].

If you add it as your default search provider you can use it directly from the address bar, and at that point it works very similarly to DDG bang syntax (although it does a few other things apart from bookmarks as well).

[0]: https://github.com/dohliam/yub

Is yubnub not working anymore? Looks operational at first glance.