  Wi-Fi 7 is already in the making, and Multi-Link Operation (MLO) is one of
the main features proposed in its correspondent IEEE 802.11be amendment. MLO
will allow devices to coordinate multiple radio interfaces to access separate
channels through a single association, aiming for improved throughput, network
delay, and overall spectrum reuse efficiency. In this work, we study three
reference scenarios to evaluate the performance of the two main MLO
implementations -- Multi-Link Multi-Radio (MLMR) and Multi-Link Single-Radio
(MLSR) -- , the interplay between multiple nodes employing them, and their
coexistence with legacy Single-Link devices. Importantly, our results reveal
that the potential of MLMR is mainly unleashed in isolated deployments or under
unloaded network conditions. Instead, in medium- to high-load scenarios, MLSR
may prove more effective in reducing the latency while guaranteeing fairness
with contending Single-Link nodes.
