That doesn't mean they are giving up entirely, they are still holding on to some of the things which they feel haven't yet been established. But this should give us two consequences. There is gradual archaeological corroboration of the Torah's account of history. They started off with a complete negative, and they are grudgingly admitting piece by piece that some parts have been verified. That means to say that they are imposing an unreasonable standard of proof for the Bible.
Archaeology can sometimes establish a positive.
If you find something such as a city that was burnt, pillaged, or destroyed, you could assume that there was some sort of military action. It is very difficult for archaeology to establish a negative - for archaeology to establish that something didn't happen. In order for that, you need to know that if it happened I ought to find it here in such and such a place. That is a very tricky judgment. Maybe you will find it someplace else.