Over the years, I've written about transitioning to faster ethernet here at home with standard copper 10GBASE-T (10GbE) cabling, beginning back in 2018. This works fine even with Cat-5e in the walls of my home (although some renovations use Cat-6). More recently, my home network was upgraded to 2.5GbE for any device that can benefit, with standard 1 gigabit/s fallback.
Last month, I needed another 10GbE network interface card (NIC) and noticed that we're now seeing inexpensive Marvell mGig AQC113C NICs available, upgrades from the AQC107 cards I have been using. So I grabbed a QFly NIC-10G (~US$75) to try out. There are other similar products like the NICGIGA (very unfortunate name), and GigaPlus.
The card offers 10G/5G/2.5/1GbE speeds and below (100/10Mbps) for compatibility. The new chip operates at only 4W running 10G speed (I believe the AQC107 is estimated at ~6W) making it even cooler-running for heavy loads.