How much just lane sharing matter? (9800X3D, 3 nvme, 5series GPU )

I am trying to decide on a morherboard for my 9800x3d build. I know I want at least 3 nvme sticks. 1 higher speed and 2 4tb storage drives - all gen 4 if that matters.

How much does this lane sharing actually come into play when gaming? I’m probably only going to be reading from one of the NVmes while gaming at a time?

I’d love to get an asrock nova to avoid this problem but they’re out of stock everywhere. Would love any x870e recommendations under $350