I thought the evidence supported early entry as a sound option?

Having had a daughter be devastated to be left behind in preschool when her peers went to K (many of them less ready on all fronts), Who then did some K at the allotted time, and THEN skipped. I so SO wish she could have just gone to K when she was ready and avoided the skip. She's lost her entire cohort of friends and had to start from scratch every single year since she was 4.5 yrs old, it's not been ideal at all.