This being said DDG was able to take over 99.99% of my searching needs for some time now. And when I have some query that doesn't seem to return anything useful on DDG it turns out Google doesn't really do much better (YMMV).
I still use Youtube and Google Maps heavily compared to alternative services. But for everything else I decided to "spread the joy" and not rely on a single provider of services.
I've had this same experience. Looking up businesses is pretty much the only time I use Google.
Amazon is !a, etc. etc.
DDG has some neat functionality via bangs (aka !): https://duckduckgo.com/bang
When I want to look something up in the norwegian Wikipedia I do !wno, for english just !w or !wen (and if I for some reason unbeknownst would want search in another language, it would be just a language tag away), I was very happy to see bangs for both the online norwegian dictionaries I use (!naob and !norsk), and some of the nicher sites, though, maybe not quite so niche here in HN: !dfw (Dwarf Fortress Wiki), even !nhw (nethack), etc.