Technology

I made a fair bit of commission upgrading people to much much better hardware and speed for not much more money.

See that's your entire problem right there, you're in sales. Your incentive is to drain every penny you can out of customers through useless up-sells and selling hardware to get the service they're already paying for.

You literally just argued that if your 600mbps router only supplies an 80mbps connection then your 600mbps connection is 80mbps. And speed isn't divided equally by the number of devices connected either, that's just ridiculous. The impact of a connected but idle device is minimal. Also, why would you need 600mbps for only 4 devices? You could stream 4k video on all four devices 24/7 and you're still not using even a quarter of that bandwidth; you're looking at a recommendation of only 15mbps to 25mbps per user for a 4k-viable internet connection.

Here's a ping to my stock ISP-supplied router on another floor and three rooms away via wifi:

***
192.168.1.1 ping statistics
***
611 packets transmitted, 611 received, 0% packet loss, time 623436ms
rtt min/avg/max/mdev = 0.647/0.779/2.105/0.110 ms

It's obviously impossible to improve a 0% packet loss, switching to a wired connection would be a considerable cost for minimal benefit (though admittedly that ping is unusually good, I'd normally expect slightly over 1ms average). I'm also getting over my advertised speeds according to fast.com and speedtest.net despite being on wifi and running through Mullvad so I suppose the problem might just be that I'm not using whichever scummy ISP you work for.

I have a home office and have work from home (or hybrid) for pretty much my entire career, even before WFH was normalised. I can assure you a wired connection is not a necessity to work from home.