Why is Netplan gateway4 deprecated?

So I've been learning how to set up my private server. I'm using netplan. According to some docs I found at https://netplan.readthedocs.io/en/stable/examples/# and a lengthy argument with Chatgpt on the right way to configure my yaml file, this is what I came up with.

network:
  version: 2
  renderer: networkd
  ethernets:
    enp2s0: 
      addresses:
        - 192.168.0.2/24
      gateway4: 192.168.0.1
      nameservers:
        addresses:
          - 8.8.8.8
          - 1.1.1.1

I get the "gateway4 is deprecated" error and I've found a wealth of knowledge on how to set up routes with via and to, but I have not found on the internet *why* gateway4 is deprecated. Is it merely syntactical or is it for some other reason? Please be aware I am **NOT ASKING A DUPLICATE QUESTION**. I am asking the specific difference between the deprecated way and the newer way and *why*.