Today I had to quickly compare trade import and export as percentage of GDP in two countries. I could basically write: (country) export and import as percentage of (country) GDP vs [repeated for country 2]. It worked in first go in WA, no issues, even produced a beautiful graph. That runs rings around Google.
Definitely, Wolfram Alpha can do way, way more than Google can. I just mean that the simple time zone conversion is one of the things Google can do; it's not a super ringing endorsement for Wolfram Alpha to be doing time zone conversions with it. Also not a ringing endorsement for DDG -- if he had used Google it would have just answered his query inline without having to use a special exclamation point query.
Taking google's answer for things they're calculating with math is probably safe, but if you get into the habit of reading google's answers to queries it will have you believing a lot of nonsense because many of the answers google offers are not calculated at all, but instead are regurgitated nonsense that google read on the internet and took at face value (example from Technology Connections: https://youtu.be/TbHBHhZOglw?t=58)
I assume the GP is referring to the instant answers it gives you in a white box separate from search results. In this instance it is calculated by google and not crawled from the web.
Those instant answers are the ones I'm talking about. Sometimes they're calculated, but often they're regurgitated from web crawls and the UI doesn't clearly differentiate the two.