The thing i really like about bangs is that i can often just assume one exists, with zero setup, across all my devices. I don't search IMDB frequently enough to bother manually adding it in a menu somewhere, but on both desktop and mobile i can do `!imdb Brad Pitt` and get directly where I intended. It also works with less common sites, like I've been using `!stardew` lately to search the Stardew Valley Wiki directly.

The most I've had to do is search the bangs documentation if i can't find the search engine i want. (for Terraria stuff i sometimes wanted `!terrg` rather than `!terraria`, and ended up searching to find the former)