I have read a lot about the older flaps and I like them. I have some light support metal bent up so I can open and lower the flaps WITHOUT a ladder. That was really the only drawback for me, opening them up. I can leave them rolled up all the time if I want to and even close the top. I also like them for keeping most of the sun out.
video attached showing the benefit on a HOT summer day when it rains all day and you need air flow AND stay dry.