Before the repeatable problem at the last DLC3 boss, I had just a few shutdowns while playing, all random, and I’ve been playing consistently since last Christmas. I’ve read others who have had much more frequent problems. Presumably there are others, who don’t write about their experiences, that have none.
I did receive a response from 2k support that says the same thing others have received in response to their reported X1X shutdowns: GBX is aware of the problem, they’re working on a solution and 2k has no way of knowing if or when a fix will happen. This has been their response since the launch of the game, so either GBX doesn’t know how to fix it or they’ve decided it’s a small enough minority of X1X players that they’re not expending resources on fixing it.
There does appear to be an occasional problem where too much is happening at once and heat rapidly spikes causing a shutdown on the X1X. Whether the X1X is less tolerant before triggering a shutdown than other models, or whether GBX allows more things to be drawn on X1X but overestimated the capabilities of X1X—I don’t know.
On the plus side, I’ve seen several reports recently of X1X crashing at the last DLC3 boss. This is the first time I’ve noticed many people having a problem at a specific area. Perhaps this will prompt GBX to try and remedy at least this one area.
Finally, my recommendation for improving game performance and load times would be getting an external SSD with USB 3.0 connection. It will make things smoother and quicker on your existing Xbox, costs considerably less than $450, and would also be a huge QOL improvement even if you do decide to get an X1X down the road. The X1X internal disk drive is not much different than the one in the S.