If you're in elementary- is your school discussing looping and having kids come back in the fall promoted to the next grade but with this year's teacher?

I just read a comment about this idea and it makes so much sense that I can't imagine too many schools are doing it

My friends. I'm loving the discussion but also I have no idea how this would work logistically and I'm not necessarily saying this is right for every school! Talk amongst yourselves but I truly have no answers for the logistical questions...