Gee, I wonder if Israel would agree to a "permanent" ceasefire if Hamas did actually offer to release all of the hostages, in exchange for a reasonable number of Gazan "detainees".
That, of course, is assuming that most of the remaining Israeli hostages are still alive.
It is hard for me to understand why Hamas is not offering a deal of that nature. I don't understand what advantage holding the hostages is currently doing for Hamas and Gaza in general.
I do believe that Israel would agree at this point. (Not that I believe Hamas would adhere to the ceasefire over the medium to long term...)
If all the hostages were released I don't think Netanyahu would have any further support for continued hostilities in Gaza, both in Israel and from the West.