When everybody has a GPS on their phone they have automatic synchronization with satellite atomic clocks. As a matter of fact there is redundancy with connection to cell towers and Internet that also syncs the clocks with atomic clocks.
What happens is that with tech advancement the main utility of clocks had disappeared like photography killed the utility of painters as recorders of visual information.
Photography created impressionism first, then cubism and ended in absurd paintings like "White over white"(empty canvas)selling for hundred of thousands of dollars, color dots for tens of millions and so on.
People selling clocks will do it for different reasons that in the past, like signaling that you have so much money you don't care about wasting it.