OpenWRT One WLAN Performance

Hi,
I want to buy an OpenWRT One and want to ask for your experience with the WLAN.
How many 2.4/5Ghz WLANs can I add? Are these only many SSIDs shared on one network wifi-device? Are these WLANs independently routeable?
What is the overall performance of the WLAN Hardware integrated in the OpenWRT One?

Thank you

8 + 16 or 16 + 16, I guess

Are these WLANs independently routeable?

yes

What is the overall performance of the WLAN Hardware integrated in the OpenWRT One?

for wifi5
1850mbps AP > STA
950mbps STA > AP > STA

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