DCC a fad or the new norm?

Leticia • Hello, I`m the mother of two wonderful kids, Jay who is 5 years and Pyn who is 1. I`ve wanted another child as soon as Pyn was born but chose to give her my all before trying for one. I`m ready now!
Is this a new thing, because I always assumed cutting cord within the first minute of life was just the norm. The idea behind "delayed cord clamping" (DCC) is that allowing blood to flow from the placenta to the baby for a few minutes after birth has health benefits for the tiny newborn. Now researchers are claiming those who wait 3-4 mins after birth has studies showing it improves fine motor skills than babies that aren't DCC. Has anybody done any more research on this? Like is there any reason why anybody won't DCC?