Very encouraging. I think +4 would be a giant swing, but with Abrams nearly edging it out in 2018 (and turnout among voters favorable to Biden certainly being way higher than in 2016 and 2018), there's a very good chance he flips GA if the national environment is favorable.
GA experts, is there any chance he'd carry GA without also winning FL and NC?
I think FL will definitely be to the left of GA, and NC to the right. NC isn't exactly trending blue because there are a lot of rural areas that are trending red, and the suburbs in NC are blood red. GA's Atlanta metro, however, is absolutely going blue at a breakneck pace.
As for FL, Trump has alienated a lot of the cuban GOP leaners. FL shouldn't be a difficult pick up for Biden despite the poor performance by dems in 2018. Biden will do well with old white voters, and cuban voters.