I've been running PD 15 for a couple days now, and the thing that immediately jumps out is that the Guest OS becomes extremely sluggish when doing anything that involves disk I/O. This is anecdotal of course, but I/O seems to be the common factor in my case. Examples include: - compiling under Visual Studio makes the guest OS nearly unresponsive for seconds at a time - running a python script that creates lots of files causes similar unresponsiveness - resuming the VM after a suspension the night before can take 5-10 minutes before it is usable. Did something change in the default I/O handler? I'm not using the new NVME driver, I just switched to PD15 and resumed my PD14 VM. I've filed a couple technical reports on this: 307667507 (compiling in visual studio), and 307945062 (resuming VM). I also filed another report for the unresponsiveness when compiling, but was never presented with the report ID so I don't know if it actually completed.