Earlier quoted context omitted.
I have the same muscle memory, but I don't think it's a bad thing. Basically I only use !g when normal DDG doesn't give me what I'm looking for, and half the time !g doesn't have it either. The only thing I can't abandon is !gmaps. And I'm just discovering a bunch of other ! commands that make DDG significantly more useful that Google (eg !esen).
I've found that "!w", which searches Wikipedia, is extremely useful.
Wikipedia should be able to search itself better than any external entity, but cannot. Wikipedia, in effect, is blind to its own data, and can deliver less insight into it's own content than multiple external Search entities.
If I use https://en.wikipedia.org/wiki/Special:Search for anything, I get weaker results, than if I use search engines to locate wikipedia articles according to the same input string.
There's something wrong with that.