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Wi-Fi 7 quietly took off while everyone was looking at AI
(www.theverge.com)
This is a most excellent place for technology news and articles.
The AX210 only supports 2x2 MIMO and I haven't seen any WiFi 6 cards with more streams than that.
An AP with 4x4 MIMO would provide more bandwidth for multiple clients since WiFi 6 supports MU-MIMO in both directions.