My grandfather, who was RCC, said he received the first three sacraments on the same day (simultaneously with baptism). He was born long before Vatican II. My mother was born in the 1940s, but she I believe she received the separate sacraments, in different years. I got separate sacraments, and I was born after Vatican II. This makes me curious as to whether the policy was decided by local bishops before it was codified for everyone.