I wish I could put Ethernet everywhere but I live in a German apartment in a German house and here walls are massive and made out of brick and concrete. Routing cables through this without it being a massive eyesore is pretty hard.
I’ve connected a switch and a second access point with mine.
Also I think they work best if there fewer of them on the same circuit. But not sure. Check first.
It's literally wifi just over an even worse medium.