Cables are fine until that stupid clip breaks off and every nudge unplugs the fucking cable ever so slightly that it doesn't work but you can't see it.
The sheer amount of engineering, FCC regulations, and wizardry that goes into making 802.11 fast is insane. It feels weird seeing so much data get shoved through radio waves which are still subject to only one transmission at a time which is why we have stuff like CSMA/CA and MIMO
On the left side is an image of an Asus RT-AC5300 Tri-Band Wireless Gigabit Router, a square, black router with a red line around the side near the upper edge, and 8 antennas coming up from the bottom. The text beneath the image reads "A $350 router with scary spikes"
On the right side is a blue Cat6 ethernet cable. The text beneath this image reads "A $3 snakey boi"
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The cheapest way to get cables is to know somebody who crimps it themselves, but for the majority of people probably buy from shitty places like walmart for a 1,000% upcharge.
If your TV vendor decides to only put 100Mb cards in their TV then unfortunately spikey boy wins and you lose unless you're willing to downrez your AV catalog.
What's the speed? Do you have a shitty 10mbps connection like my parents? Then WiFi, because you're easily saturating that line either way.
Do you have gigabit? Then Ethernet, but then again getting like 600mbps wirelessly is good enough.
Biggest thing is having GOOD coverage. My house has multiple access points so that my connection is great everywhere. People with a shitty ISP router shoved in the cupboard in their basement make no sense lol.
Real talk though, I own that router and it's awesome. Can't say the wifi signal is much different than any other router I've owned, but it's got loads of awesome features I use for hosting stuff. DDNS support plus Let's Encrypt plus OpenVPN support in one box. Very handy.
As someone who runs a mini homelab in a building I don't have access to the Internet hardware, you'd be surprised how a combination of the two can be very reliable and fairly fast.
All my devices have a gigabit connection to one another but the web router is just a 5gHz link.
Doesn't matter, I'm on 5g home internet (about 10 times faster than the best wired option and 3 times cheaper) and I'm not about to drill holes into the rental or run cable on the floor to still have higher than average ping. I don't play multiplayer games.
Don't forget the hundreds or thousands of dollars it'll take to wire up your whole house with Ethernet plus the wireless router you'll need anyway for any device that doesn't have an ethernet plug