Interesting video on level1techs about the complexity of DDR5 and stability I knew from my own testing that it didn't take much more than 50C for instability to creep in but did not realise how much more complicated 5 is Vs 4, and it does things like throttle etc, when it gets warm which can lead to stutter and errors or that in desktop land it probably doesn't have all the sensors it needs. Obviously he's coming at it from a server perspective but it doesn't change for a desktop. As an over clocker, I have always run many days of testing and watch my machine behaviour and certainly for me I required a RAM cooler to keep things in check, certainly when my GPU was on air as the flow through design meant heat was dumped right on to the memory In these days of memory constraints a cheap fan over your RAM can only be a good thing or at least run hwinfo and see where things lie after a session. I've had a DDR cooler for years it was the only way to get 4 DIMMs properly stable and that was with DDR4.
none of these problems are new... DDR5's complexity just means you're more likely to run into them, and/or sooner