However, USB-C is available. There must be adapters for it
Think it is normal, since it is trying to be as thin as possible, and if there's an Ethernet port, you have to build the notebook thicker
As of this year, all Intel processors are equipped with Wi-Fi.
Here is an adapter:
It always depends.
My T495 has all the connections you need
Since the majority today have a Wi-Fi-compatible router and, at least in private use, only a few bother to create a fixed workstation for notebooks, the need for an Ethernet port is simply eliminated for most users. Nevertheless, many notebooks are still equipped with this port.
Alternatively, there are USB-C to Ethernet adapters for around 15 euro, as you already suspect.
But ethernet is still faster
For normal data transmission, yes, but WLAN is significantly faster than pretty much any internet connection. You just don't need Ethernet for most purposes with a laptop
