&gt; almost no drawback<p>1. You need to purchase a Li-Fi &quot;router&quot; for each room (if not several) instead of purchasing a single router<p>2. Connecting the &quot;routers&quot; to internet: you would either need a lot of cables... or Wi-Fi.<p>3. Only works in line-of-sight, while Wi-Fi works through walls... and pockets. Li-Fi probably wouldn&#x27;t be useful for smartphones.<p>Enough drawbacks?