Thinking of upgrading to a 9800x3d/5080, realistically how much of an improvement will that be over my now 7 year old build?

I bought the high end about 7 years ago a 9900k/2080ti. I made a lot of mistakes with the build and I am starting to become unhappy with the performance, noise and thermals. I want to start from scratch assuming I can get a 5080 today and really focus on getting a case with a clean aesthetic and airflow. But how much better is my gaming experience going to be? I am getting inconsistent performance in Cyberpunk and FF7 Remake.

Edit: doesn’t matter cause I didn’t get a GPU. Was ready to go on every website and never saw anything pop into stock. Got in line at Best Buy multiple times with no luck. Oh well.