Just a heads-up that I've been able to download and play previously purchased DLC in TSW4 on XBOX Series X. I had a quick run in a Class 31 from Paddington to Ealing Broadway. Everything seems to look and run nicely, although the loco engine seemed quiet, especially from inside the cab. That may be my imagination, however, given all the comments about TSW4 sound balance. I'll be interested to hear the opinions of others once they dive into their DLC.