I'm by no means an expert, but it just seems logical to me given the stuff I've already replaced and now seeing it stall a few times. I'm figuring if I had a vac leak somewhere it would cause issues while idling, but I have no issues when idling as long as the car gets to idle, it's when it's transitioning that it may or may not die bc the valve in my mind isn't always opening. The valve is moving around over and over and over. Hundreds of times I imagine in stop and go traffic. I also had mechanic do a smoke test and car didn't have an issue.

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2003 X5 3.0i Silver (build 07/03)
2006 X5 3.0i Blue
1977 Ferrari 308 GTB
1994 Ferrari 348TS Speciale #14/15
1989 Ferrari Testarossa