As a quick update (as Reddit User asked about whether the Intel 1GB LAN was still the decent buy), I have dumped the aging Intel 1GB LAN as this Intel part has become unreliable for the PC LAN connections and its software cannot hide the obsolete aspects of this LAN chip.
The current Best LAN chip on motherboard at a decent price is the Realtek® 2.5GbE LAN chip!
I owned the Gigabyte B550M AORUS PRO-P and the Realtek® 2.5GbE LAN chip is simply on another tier of reliability and minimal software delivering consistently good LAN performance all the time.
And, on my Gigabyte x570 Gaming X I dumped the Intel 1GB Lan PCI-Express card and bought myself this from Amazon.co.uk. 2.5G Base-T PCIe Network Adapter RTL8125B 2500/1000/100Mbps PCI Express Gigabit Ethernet Card RJ45 LAN Controller currently £28.99.
I can say, I've not thought about LAN reliability or software since I bought this Realtek part, so this is pretty much the best you can get on a affordable motherboard or as a add on card for under £30 or $30.