Ethernet Availability

Arduino Ethernet Rev3 without PoE

This is retired, now what do I for Ethernet connectivity

Everyting moves to WiFi.

Other dealers still have stock. Use Google.
Here's one I found in 10 seconds.

There was a recent official response regarding the absence of Ethernet products in the Arduino Store:

We have released a couple of products that have the Ethernet connectors:

Those two products will become available soon.

I hope this helps

Not actually available for purchase yet so you'll indeed need to look elsewhere but at least it's good to know that Arduino understands WiFi is not always the best option for network connectivity. I'm definitely a fan on Ethernet.