The drawback is that evildoers can still attack the WPA2 handshakes and can force devices to downgrade, so you’re still getting effectively WPA2 level security until you actually turn off WPA2.
But if it doesn’t cost you anything, you can just turn it on and make their life just s little bit harder.
Most routers include backwards compatibility with WPA2 as a fallback, while newer devices will use WPA3. Should be relatively seamless
The drawback is that evildoers can still attack the WPA2 handshakes and can force devices to downgrade, so you’re still getting effectively WPA2 level security until you actually turn off WPA2.
But if it doesn’t cost you anything, you can just turn it on and make their life just s little bit harder.