This stands out for me:
"We're still working to identify everyone in the area on the afternoon that Summer went missing.”
Yes, I agree. By the PC earlier this week, I was under the impression they had tracked down every driver of every car they saw. I don't think they necessarily said that; I probably misinterpreted what they said.
Also we don't know where the cameras were they checked. They may not have captured every single vehicle that went to or past the Wells house.
Also I had the thought that perhaps someone else who lives out that way and has cameras may be on vacation or out of town since the disappearance and they haven't gotten all the footage they could yet. IIRC the footage that ended up capturing Mollie Tibbetts' killer came in a few weeks after she had gone missing and not immediately after. So I am holding out hope a break in this case is still to come.