I think Bethesda has put themselves on an uphill path if Fallout76 is really a online survival game.
The survival game fad has definitely come and gone, and even if they're frantically changing it to a Fortnite clone, they're going to be late to that party too, unless they literally launch it during e3.
I hope they're also working on a New Vegas -style spin-off, because if they're not, they're leaving money on the table.