Who cares if there are holdbacks at this age? All the kids on the field are hoping to make varsity as soon as possible and guess what that means playing older kids. With Covid everyone lost a year at least so there are going to be a lot of holdbacks and not to mention look at college, kids are not leaving which pushes everything back. It is a business decision at this point a lot of kids will be doing post grad years who graduate this year and next because of the logjam. It is what it is it really is only an advantage pre-puberty. Once everyone is on same playing field age doesn't matter.