I know only one solid 4.5 singles player in his late thirties who S&Vs and C&Cs exclusively on all his serve/return points. Otherwise, you are right that all the 4.5 singles players I play against who S&V a lot are older than fifty years in age. But, many of the younger guys have solid volley technique and will come to the net to finish points. I think that the advanced rec players from the generation which grew up with poly strings do not depend on the S&V style as much as previous generations did because it is so much easier to hit Serve+1 winners from mid-court with poly strings on slow hard courts.
In doubles, almost everyone S&Vs at 4.5+ and it is more uncommon to find players who don’t come to net as soon as possible on both serves and returns. Many of the 4.5+ guys are ex-college players and it seems like they have all been coached to play S&V in doubles even if they are young guys who grew up with poly strings. The only exception is when they are returning against some of the guys who serve >100mph and in those cases, it is common to see 1-back or 2-back return formations. It seems like in 3.5/4.0 doubles, it is rare to see S&V or C&C - 1-back formations are common for the serving team also due to the less developed transition volley skills.
