2018 has 802.11ac Wi_Fi and three antennas. the maximum Wi-Fi speed is 1300 M bits/sec without changing anything, but that is right next to the router under prefect conditions, establishing an 80 MHz channel with no completion from neighbors.
if you use an ordinary Ethernet adapter, you can easily get rock-solid 1 G bits/sec oner rather ordinary Category 5 cables up to 100 meters long.
if you want to go faster, you could buy a 2.5 G bits sec Ethernet adapter. if you want to go faster still, up to 10 G bits/sec Ethernet is available over select cables, such as category 6 OR shorter lengths of cable, but still plenty for home uses. 10 G bits/sec adapter comes in a finned aluminum enclosure and may get 'burn your skin' HOT
Now the bad news:
Those fast-sounding connection speeds, although the vendors DO deliver them, and mostly HYPE. The Internet internally is not responsive enough to provide tangible, meaningfully faster, performance.
Many Routers can not switch and forward traffic at speeds above 1 G bits/sec.
I was given an upgrade from 25 M bit sec to 1 Gigabit during the course of a FIOS upgrade. The performance difference was ...
..not noticeable. After a few months I went saved money by going back to the slowest connection available, which in my area is 300 M bits/sec, and the slowdown was .. again, not noticeable.