The design has such a principle — “Saving ink”. The point is what: any element in the interface, graphics, timetable, etc. can be shown using the least amount of text or color.
For example, here is the language switcher on the website:

There are as many as four elements: black plate, blue plate, “RU”
and “EN”. We can do better:
It turns out that the stations in the Mexico City metro are duplicated with pictograms.

They are also used in navigation: https://image.businessinsider.com/5c3f55f155ab0b1d122ef173
In Mexico, 5% of the population cannot read. How hard it was for the designers to come up with so many icons.
I love everything about information design. Recently I saw this:

In general, It’s good training for brain — layout card in the online store. Yandex’s designers were able to fit as many as 4 objects of information on a pink plate — a plate with interest, the old and new price, the Yandex.Plus sign and information about credit.
This is better than 10 shots from Dribble.
By the way, the icon with two rings is “Compare”. Now, I see, Yandex will transfer designers from the scale icon to these two circles.