Qualcomm Networking Pro 1210 platform. Pricing is reported to be $450 for one node,
From the release:
Linksys AXE8400 will be available beginning Spring/Summer 2021 in the US for MSRP $449.99 (1-pack), $849.99 (2-pack), and $1,199.99 (3-pack) from Linksys.com; global availability to follow in the second half of 2021.
I believe this is a new pricing high for a Wi-Fi mesh system.