Xbox is very good with the save data yes it will all carry over. They have made it very easy to switch there’s an option to back up the data and when you log into your new console it can even transfer over. But i’ve had a few xbox’s in my house and it’s very easy to jump from one to the other. If you play mostly story games you’re gonna be shocked how fast games load with the Series systems. I’d definitely get series system over the elite controller ok but I would never choose it over a system upgrade.