Tell them how much power the TV and radio broadcast towers put out and watch them freak out. The analog TV stations ran even higher power than the digital ones do now.
Blurays will be much more reliable and will write much faster than cheap flash drives. A double layer disc only holds 46.5 GiB though and triple layer discs are still somewhat expensive.
Skyrim and Fallout 4 really need a CPU with very good single threaded performance. If you have a lot of cores, make sure nothing is running in the background so you can get a higher boost speed on the cores the game is using.
It sounds like he wants everything done server side like they did in the mid 90's. It's certainly possible, but it won't result in a very good user experience. The whole page would have to reload to change anything on it.
I typically look for 1080p X265 encodes around 2-4 mbps to save disk space. I will download higher bitrates for anything with a lot of film grain since it will get very blocky at lower bitrates.
I can't tell much difference between 1080p and 4K unless I'm very close to a large screen. Also, most 4K files are HDR and I don't have anything that supports HDR.