[RPG] Is Bahamut still alive in the Forgotten Realms in 1489 DR

Discussion from 2010 suggests the wall is still there, and unbelievers are on a timer before they're cemented into the wall of the faithless.

Quoth:

It's still there until they specifically say it's not. We've been told to assume that unless something is described as different or gone, then it's still there.

Details of the wall:

Some minimal amount of real worship is required to initiate a patron relationship with a god. Without a patron, no god can claim you, so you are stuck in the Fugue. The servitors of any god who is not your patron cannot even see you, speak to you or interact with you in anyway. After a time, if no god comes to collect you, you feel the siren tug of Kelemvor's city calling to you to come for judgment.

The faithless begin to petrify and are tossed onto the wall. There is a moss that acts like a mortar that is corrosive and breaks down the substance of the petitioner body. Eventually the petitioner body is eaten away.

Moreover, there seems to be discussion of discussion of the wall in 4e fiction:

The wall was also mentioned in 4e novels (Edge of Chaos briefly mentions it IIRC)

On the other hand, heroes of shadow has worked out the Keeper of the Everflow ED. While the Heroes of X books are certainly not FR, the wall of the faithless can trivially equate to the raven queen stealing souls for her afterlife and Keepers can exist trying to restore the "natural" order of things.

You've found them all.

The Forgotten Realms was first published for AD&D 1st edition. When 2nd edition came out, the change in spells and available classes was explained through the Godswar aka The Time of Troubles.

The introduction of D&D 3e was exceptional in that there was no overarching, global in-setting event introduced to explain the rules changes. Oddly, the adventure Die Vecna Die! was intended to explain the rules changes (for all D&D settings), but its events were never made FR canon. WotC just proceeded with the 3e rules and setting changes without adding any corresponding historical events. The 3e change is thus “silent” in FR's historical record.

Karsus's Folly was made global setting canon with 3e as a historical detail that further developed the history of Netheril and explained some changes local to the Anauroch and some new game elements, but it wasn't the same kind of global upheaval—it was more of a retcon slipped in as undisruptively as possible.¹

The Spellplague (and about a century) explained the shift from D&D 3.x to 4e, and the Second Sundering did the same for the transition to 5e.

1. ^{Although Karsus's Folly was first described in a 2e adventure, the way 2e setting publishing worked meant that only the frozen-moment-in-time documented by the basic setting boxed set was canon. DMs were given explicit authority over what was canon beyond that. Thus changes made by adventures were only canon in a campaign if a DM used those in their campaign — because of course, the PCs might change the outcome! D&D 3e cemented Karsus's Folly as the official way it happened in Realms history for that revision of the base setting, so though it took place earlier, it wasn't canonised until 3e.}