You can't find anything on discord with a web search. You can't even open it without logging in. Once you're logged in, good luck finding an answer to a problem that was posted a year or two ago. That's much worse than reddit.
It's not uncommon for a single web page to use 5-10MB. Shopping and social media sites are the some of the worst since they have lots of javascript libraries and pictures. It's not hard to use a couple GB in a day without streaming anything.
Downloading bluray rips will give you the best quality. Any DRM should be removed when it's ripped. Movies are usually 1.85:1 or 2.39:1 and will be letterboxed since that's wider than a normal 16:9 TV. You can either crop it out, which will require re-encoding or just zoom in while watching it. A hardware video encoder will make the files larger. I would recommend using software encoding if you have the time.
You can use MakeMKV to rip your blurays on Linux. Normal blurays are easy to rip, 4K needs an old drive with custom firmware. It's free while it's in beta, but you will have to get a new license key every month.
Punch cards have been around for over 200 years. No electronics are needed to punch them. Some very complex patterns were created with the Jacquard loom without any computers. It just takes a massive amount of work to create the cards.
It's not really 10x unless you're comparing to something like an N100 mini PC. It's not unusual for a gaming PC to idle around 100 watts though. That does get expensive if it's on 24/7.
It sure would be nice to have WebSerial as well. For some reason Mozilla seems to think users can't be trusted with it. They could at least add a compile time option to enable it. If someone knows how to compile a browser, they are probably smart enough not to give random websites access to their devices.
I doubt it would work for the buffer memory in a high speed camera. That needs to be overwritten very frequently until the camera is triggered. They didn't say what the erase time or write endurance is. It could work for quickly dumping the RAM after triggering, but you don't need low latency for that. A large number of normal flash chips written in parallel will work just fine.
You would have to specifically open a port in your firewall before anyone could access a device over IPv6 on your network from the internet. Just like you would have to forward a port on IPv4.
You can't find anything on discord with a web search. You can't even open it without logging in. Once you're logged in, good luck finding an answer to a problem that was posted a year or two ago. That's much worse than reddit.