Budget reconciliation abuse is the second least likely way around the filibuster and it has always been such, imo. I'm not sure why Bernie's stuck on that, and I'm not sure why people cheer that as a particularly good suggestion. I mean, budget reconciliation was likely to be used at least once before the current situation, but... Biden, even during the primary, had suggested the most likely way: changing the filibuster rule so it can't be used to indefinitely block bills. It gives cover to those that are against abolishing it and allows any type of bill to pass without having to worry about court challenges nearly as much.
Either way, if McConnell keeps up blocking people from being appointed to committees, then I think an outright filibuster nuke is probably going to happen, and before his stunt I'd say that's the least likely scenario.