Don't you think board vendors tested the PCIe 4.0 compatability before releasing the BIOS with PCIe 4.0 support? I think the more likely explanation is that AM

Don't you think board vendors tested the PCIe 4.0 compatability before releasing the BIOS with PCIe 4.0 support? I think the more likely explanation is that AMD wants to sell 500 series chipsets and is using its leverage on the board vendors.