In "recent" times, we've been seeing more and more tutorials using apt instead of apt-get. Is it the wrong, or the right one?
apt command arose to usage because it combines the... "best of both!" Some commands we use come from apt-get (such as install) and some other come from apt-cache. (such as search).
Not really the best, but the most popular, most widely-used commands. It is intended to replace both apt-get and apt-cache to just apt!
There's nothing wrong if you decide to NOT use it, and continue using apt-get. In fact, it interacts with the system on a lower level, and this might be more effecient (talking to self: seriously? you talk about efficacy? how much difference can that make?)
If you are in a hurry, you can always type apt instead of apt-get! It will save you a whole lot of... 0.25-0.3sec each time? (Seriously again?)
Image source: 1
I'm sorry if you didn't like my semi-sarcastic tone at the end, I felt like it, and I think it really adds a little something. The GIF is from South Park's episode Cash for Gold (S16E02). Watch it on the official South Park website for free