[0]: https://www.pcmag.com/reviews/intel-nuc-9-extreme-kit-ghost-...
I would like to re-test things once the CM5 comes out, but as you state, more PCIe bandwidth is better. Would love to have at least Gen 3 x4, that way you could also get more bandwidth between other devices too, like NVMe + GPU + 2.5 Gbps NIC.
[1]: https://www.tomshardware.com/news/minisforum-b550-amd-ryzen-...