Chrome has had a similar feature for many years. Arguably quicker because you can assign any key press(es) you like. For example I have mine setup such that typing ‘drive foo’ searches Google drive for the term foo. I had kagi as my default search engine but had Google easily available as a back up by typing ‘g <search term>’ in the address bar.

Unfortunately, having both search engines easily available led me to discover as much as I like Kagi I just use google more, despite its ads. Google is faster to get answers to simple questions (it usually answers them on the results page, without another click) and shows more results, although you need an extension for the latter.

More info on how to set up these shortcuts here: https://superuser.com/a/1806652

It's nice too. I have several "Snaps" before snaps existed, i used `!red` for `site:reddit.com`/`!sub rust` for `site:reddit.com/r/rust` searches and whatnot. `@red` will be a lot easier!