  Will Multi-Link Operation (MLO) be able to improve the latency of Wi-Fi
networks? MLO is one of the most disruptive MAC-layer techniques included in
the IEEE 802.11be amendment. It allows a device to use multiple radios
simultaneously and in a coordinated way, providing a new framework to improve
the WLAN throughput and latency. In this paper, we investigate the potential
latency benefits of MLO by using a large dataset containing 5 GHz spectrum
occupancy measurements. Experimental results show that when the channels are
symmetrically occupied, MLO can improve latency by one order of magnitude. In
contrast, in asymmetrically occupied channels, MLO can sometimes be detrimental
and increase latency. To address this case, we introduce Opportunistic
Simultaneous Transmit and Receive (STR+) channel access and study its benefits.
