While that is true, the 3200mhz kit used in the tests is CL14 which is more expensive and difficult to find, as per Steve himself. 3600mhz CL16 is more in supply and less expensive.
This is probably first time a dual channel platform is more efficient with quad channel array.
Indeed they were with the previous gen., but for this gen. atleast they are giving the better BIOS earlier than others...
"MSI has gone one better and bundled AGESA v2 1.1.0.x firmware, which should deliver the 'best experience' for AMD 500 series chipsets paired with Ryzen 5000 processors "
https://www.notebookcheck.net/AMD-R...il-January-2021-at-the-earliest.497827.0.html
On a side note, while the b550 can easily handle the new Ryzen processors, for this gen. I would go with the x570 chipset simply for its better power cycles, power limits and VRMs overall for sustained loads. At current price points, the b550 boards are almost equally expensive in spite of missing out the PCIe4 support.