Pretty decent deal for the parts given, though I would also consider if you agree with those parts.

For instance, there might be a killer deal on a 4090, but I wouldn't buy it anyways because I don't want a 4090/I still wouldn't want to pay the discounted price. You should think about whether those parts are parts that you want.

AM4 is somewhat old, but most of the selling price in this case is from the absolutely insane market price of a 4080. Frankly, if I were aiming for that performance tier, I would have gone for a 7900XTX, but Nvidia does have better productivity and ray tracing. Regardless, the 5800X3D holds up very well, even against modern generation halo products. So as long as you're not planning to upgrade the CPU anytime soon, I expect that going AM4 shouldn't be a problem