Interesting.
Our baby arrived 10 weeks premature and although it wasn't immediately after birth (as I'll explain why below), the hospital strongly encouraged the kangaroo care as mentioned in the article, which mom did daily until we could take our baby home.
In a week it will be a full year since birth and the baby is in no way behind developmentally compared to other 10 month olds (when adjusting age due to prematurity). So although anecdotal, I can believe this can be a very helpful practice.
Due to arriving mid-pandemic and because neither of us had COVID tests prior to the unexpectedly premature birth, we weren't allowed to visit the baby in the NICU until our tests came back negative, which was about 30 hours later. I wasn't even allowed to be with mom during delivery, but the doctor did allow me to see the baby for a couple of minutes from a distance and under the proviso that I touched nothing in the NICU (including things like walls, windows, doors, handles, etc).
Anyway, somewhat superfluous information at the end there, but it was quite an experience and I'm just happy everything turned out fine.