You may have noticed that Wi-Fi 6 802.11ax and Wi-Fi 5 802.11ac Access Points come with multiple radio chains to support MIMO either 2×2 3×3 4×4 or even 8×8. Simply put MIMO adds more capacity without using more spectrum. Each radio chain will increase speed but the client and AP must match to take advantage of this.
However most clients like smartphones, tablets and laptops only support 2×2 MIMO to save power. So what is the advantage of those extra antenna / radio chains?
If there is a mismatch in MIMO levels between the client and AP the antennas do not go unused, but are used for ‘diversity’ and ‘beamforming’, which extends range, and improves speed at range.
So a AP with more radio chains is better for all types of clients and usually has more memory and CPU allowing the AP to manage more connections faster.
Check out the EWS377AP it supports Wi-Fi 6 and has 4×4 radio chains https://www.keenansystems.com/store/catalog/product_info.php?products_id=564